![](https://news.europawire.eu/wp-content/uploads/2018/01/Fraunhofer-New-quantum-sensor-to-precisely-measure-the-tiny-magnetic-fields-in-the-next-generation-of-hard-discs.jpg)
Fraunhofer: New quantum sensor to precisely measure the tiny magnetic fields in the next generation of hard discs
MUNICH, 04-Jan-2018 — /EuropaWire/ — Integrated circuitry is becoming increasingly complex. These days a Pentium processor contains some 30 million transistors. And the magnetic structures found in hard drives measure just 10 to 20 nanometers across – less than a flu virus at 80 to 120 nanometers in diameter. Dimensions are rapidly approaching the realm of quantum physics and, already, researchers at the Fraunhofer Institute for Applied Solid State Physics IAF in Freiburg are applying themselves to the quantum technology challenges of tomorrow. Together with colleagues at the Max Planck Institute for Solid State Research, they are developing a quantum sensor that will be able to precisely measure the tiny magnetic fields we can expect to see in the next generation of hard discs. The sensor itself is just slightly larger than a nitrogen atom, with a synthetic diamond to act as a substrate.
Diamond has a variety of advantages quite apart from its considerable mechanical and chemical stability. For instance, one can implant foreign atoms such as boron or phosphorus, thereby turning the crystals into semiconductors. Diamond is also the perfect material for optical circuits. But perhaps its greatest attribute is its impressive thermal conductivity, with the strength of the carbon atom bonds ensuring that heat is rapidly dissipated.
Over the past decades, Fraunhofer IAF has developed optimized systems for producing diamonds. The process for mass production takes places in a plasma reactor, and Freiburg possesses many of these silver-colored devices. Plasma is ignited to generate temperatures of 800 to 900 degrees Celsius so that, when gas is fed into the chamber, diamond layers can form on the square-shaped substrate. The diamond crystals have an edge length of between three and eight millimeters, and are then separated from the substrate and polished using a laser.
Preparing the diamond to act as a magnetic detector
Manufacturing the innovative quantum sensor requires a particularly pure crystal, which has inspired further improvements in the process. For instance, in order to grow ultra-pure diamond layers, the methane that provides the carbon for the diamond is pre-filtered using a zirconium filter. On top of that, the gas must be isotopically pure, since only 12C – a stable isotope of the carbon atom – has zero nuclear spin, which is a prerequisite for the magnetic sensor later on. The hydrogen also undergoes a purification process, after which the ultra-pure single crystal diamond must be prepared for its role as a magnetic detector. Here there are two options: either you insert a single nitrogen atom into the extremely fine tip, or you add nitrogen at the final phase of the diamond production process. After that, the diamond tip is honed in oxygen plasma using an etching process in the institute’s own cleanroom. The final result is an extremely fine diamond tip that resembles that of an atomic force microscope. The key to the whole design is the added nitrogen atom together with a neighboring vacancy in the crystal structure.
This combined nitrogen-vacancy center acts as the actual sensor, emitting light when it is exposed to a laser and microwaves. If there is a magnet nearby, it will vary in its light emission. Experts call this electron spin resonance spectroscopy. Not only can this technique detect magnetic fields with nanometer accuracy, it can determine their force as well, opening up an extraordinary range of applications. For instance, the tiny diamond tips can be used to monitor hard drive quality. These data storage devices are tightly packed and there are always tiny errors. The quantum sensor can identify defective data segments so that they are excluded from the disc reading and writing process. This reduces the defect rate, which is soaring as miniaturization continues apace, and cuts down on production costs.
Quantum sensors could measure brain activity
The tiny sensor can potentially be applied in a wide range of scenarios, since there are weak magnetic fields everywhere, even in the brain. “Whenever electrons move, they generate a magnetic field,” says IAF expert Christoph Nebel. So when we think or feel, our brains are generating magnetic fields. Researchers are keen to localize this brain activity to determine the areas of the brain that are responsible for a certain function or feeling. This can be done directly by measuring brainwaves using electrodes, but the results are very imprecise. Magnetic field measurements offer far better results. However, the sensors in use at the moment have one significant disadvantage in that they must be cooled with liquid nitrogen. Drawing on the extreme thermal conductivity of diamond, the new technology can operate at room temperature without the need for any cooling. For this application, instead of using fine tips you would use tiny platelets that incorporate multiple nitrogen-vacancy centers. Each center supplies a point in the image and, together, a detailed picture.
Currently, however, Christoph Nebel and his team are focusing their attention on researching and optimizing diamond as a high-tech material. This application in quantum sensor technology is a promising beginning.
Contact:
Laura Hau
Fraunhofer Institute for Applied Solid State Physics
Tullastraße 72
79108 Freiburg
Phone +49 761 5159-350
Source: Fraunhofer
###
- Astor Asset Management 3 Ltd: Salinas Pliego Incumple Préstamo de $110 Millones USD y Viola Regulaciones Mexicanas
- Astor Asset Management 3 Ltd: Salinas Pliego Verstößt gegen Darlehensvertrag über 110 Mio. USD und Mexikanische Wertpapiergesetze
- ChargeEuropa zamyka rundę finansowania, której przewodził fundusz Shift4Good tym samym dokonując historycznej francuskiej inwestycji w polski sektor elektromobilności
- Strengthening EU Protections: Robert Szustkowski calls for safeguarding EU citizens’ rights to dignity
- Digi Communications NV announces the release of H1 2024 Financial Results
- Digi Communications N.V. announces that conditional stock options were granted to a director of the Company’s Romanian Subsidiary
- Digi Communications N.V. announces Investors Call for the presentation of the H1 2024 Financial Results
- Digi Communications N.V. announces the conclusion of a share purchase agreement by its subsidiary in Portugal
- Digi Communications N.V. Announces Rating Assigned by Fitch Ratings to Digi Communications N.V.
- Digi Communications N.V. announces significant agreements concluded by the Company’s subsidiaries in Spain
- SGW Global Appoints Telcomdis as the Official European Distributor for Motorola Nursery and Motorola Sound Products
- Digi Communications N.V. announces the availability of the instruction regarding the payment of share dividend for the 2023 financial year
- Digi Communications N.V. announces the exercise of conditional share options by the executive directors of the Company, for the year 2023, as approved by the Company’s Ordinary General Shareholders’ Meetings from 18th May 2021 and 28th December 2022
- Digi Communications N.V. announces the granting of conditional stock options to Executive Directors of the Company based on the general shareholders’ meeting approval from 25 June 2024
- Digi Communications N.V. announces the OGMS resolutions and the availability of the approved 2023 Annual Report
- Czech Composer Tatiana Mikova Presents Her String Quartet ‘In Modo Lidico’ at Carnegie Hall
- SWIFTT: A Copernicus-based forest management tool to map, mitigate, and prevent the main threats to EU forests
- WickedBet Unveils Exciting Euro 2024 Promotion with Boosted Odds
- Museum of Unrest: a new space for activism, art and design
- Digi Communications N.V. announces the conclusion of a Senior Facility Agreement by companies within Digi Group
- Digi Communications N.V. announces the agreements concluded by Digi Romania (formerly named RCS & RDS S.A.), the Romanian subsidiary of the Company
- Green Light for Henri Hotel, Restaurants and Shops in the “Alter Fischereihafen” (Old Fishing Port) in Cuxhaven, opening Summer 2026
- Digi Communications N.V. reports consolidated revenues and other income of EUR 447 million, adjusted EBITDA (excluding IFRS 16) of EUR 140 million for Q1 2024
- Digi Communications announces the conclusion of Facilities Agreements by companies from Digi Group
- Digi Communications N.V. Announces the convocation of the Company’s general shareholders meeting for 25 June 2024 for the approval of, among others, the 2023 Annual Report
- Digi Communications NV announces Investors Call for the presentation of the Q1 2024 Financial Results
- Digi Communications intends to propose to shareholders the distribution of dividends for the fiscal year 2023 at the upcoming General Meeting of Shareholders, which shall take place in June 2024
- Digi Communications N.V. announces the availability of the Romanian version of the 2023 Annual Report
- Digi Communications N.V. announces the availability of the 2023 Annual Report
- International Airlines Group adopts Airline Economics by Skailark ↗️
- BevZero Spain Enhances Sustainability Efforts with Installation of Solar Panels at Production Facility
- Digi Communications N.V. announces share transaction made by an Executive Director of the Company with class B shares
- BevZero South Africa Achieves FSSC 22000 Food Safety Certification
- Digi Communications N.V.: Digi Spain Enters Agreement to Sell FTTH Network to International Investors for Up to EUR 750 Million
- Patients as Partners® Europe Announces the Launch of 8th Annual Meeting with 2024 Keynotes and Topics
- driveMybox continues its international expansion: Hungary as a new strategic location
- Monesave introduces Socialised budgeting: Meet the app quietly revolutionising how users budget
- Digi Communications NV announces the release of the 2023 Preliminary Financial Results
- Digi Communications NV announces Investors Call for the presentation of the 2023 Preliminary Financial Results
- Lensa, един от най-ценените търговци на оптика в Румъния, пристига в България. Първият шоурум е открит в София
- Criando o futuro: desenvolvimento da AENO no mercado de consumo em Portugal
- Digi Communications N.V. Announces the release of the Financial Calendar for 2024
- Customer Data Platform Industry Attracts New Participants: CDP Institute Report
- eCarsTrade annonce Dirk Van Roost au poste de Directeur Administratif et Financier: une décision stratégique pour la croissance à venir
- BevZero Announces Strategic Partnership with TOMSA Desil to Distribute equipment for sustainability in the wine industry, as well as the development of Next-Gen Dealcoholization technology
- Digi Communications N.V. announces share transaction made by a Non-Executive Director of the Company with class B shares
- Digi Spain Telecom, the subsidiary of Digi Communications NV in Spain, has concluded a spectrum transfer agreement for the purchase of spectrum licenses
- Эксперт по торговле акциями Сергей Левин запускает онлайн-мастер-класс по торговле сырьевыми товарами и хеджированию
- Digi Communications N.V. announces the conclusion by Company’s Portuguese subsidiary of a framework agreement for spectrum usage rights
- North Texas Couple Completes Dream Purchase of Ouray’s Iconic Beaumont Hotel
- Предприниматель и филантроп Михаил Пелег подчеркнул важность саммита ООН по Целям устойчивого развития 2023 года в Нью-Йорке
- Digi Communications NV announces the release of the Q3 2023 Financial Results
- IQ Biozoom Innovates Non-Invasive Self-Testing, Empowering People to Self-Monitor with Laboratory Precision at Home
- BevZero Introduces Energy Saving Tank Insulation System to Europe under name “BevClad”
- Motorvision Group reduces localization costs using AI dubbing thanks to partnering with Dubformer
- Digi Communications NV Announces Investors Call for the Q3 2023 Financial Results
- Jifiti Granted Electronic Money Institution (EMI) License in Europe
- Предприниматель Михаил Пелег выступил в защиту образования и грамотности на мероприятии ЮНЕСКО, посвящённом Международному дню грамотности
- VRG Components Welcomes New Austrian Independent Agent
- Digi Communications N.V. announces that Digi Spain Telecom S.L.U., its subsidiary in Spain, and abrdn plc have completed the first investment within the transaction having as subject matter the financing of the roll out of a Fibre-to-the-Home (“FTTH”) network in Andalusia, Spain
- Продюсер Михаил Пелег, как сообщается, работает над новым сериалом с участием крупной голливудской актрисы
- Double digit growth in global hospitality industry for Q4 2023
- ITC Deploys Traffic Management Solution in Peachtree Corners, Launches into United States Market
- Cyviz onthult nieuwe TEMPEST dynamische controlekamer in Benelux, Nederland
- EU-Funded CommuniCity Launches its Second Open Call
- Astrologia pode dar pistas sobre a separação de Sophie Turner e Joe Jonas
- La astrología puede señalar las razones de la separación de Sophie Turner y Joe Jonas
- Empowering Europe against infectious diseases: innovative framework to tackle climate-driven health risks
- Montachem International Enters Compostable Materials Market with Seaweed Resins Company Loliware
- Digi Communications N.V. announces that its Belgian affiliated companies are moving ahead with their operations
- Digi Communications N.V. announces the exercise of conditional share options by an executive director of the Company, for the year 2022, as approved by the Company’s Ordinary General Shareholders’ Meeting from 18 May 2021
- Digi Communications N.V. announces the availability of the instruction regarding the payment of share dividend for the 2022 financial year
- Digi Communications N.V. announces the availability of the 2022 Annual Report
- Digi Communications N.V. announces the general shareholders’ meeting resolutions from 18 August 2023 approving amongst others, the 2022 Annual Accounts
- Русские эмигранты усиливают призывы «Я хочу, чтобы вы жили» через искусство
- BevZero Introduces State-of-the-Art Mobile Flash Pasteurization Unit to Enhance Non-Alcoholic Beverage Stability at South Africa Facility
- Russian Emigrés Amplify Pleas of “I Want You to Live” through Art
- Digi Communications NV announces the release of H1 2023 Financial Results
- Digi Communications NV Announces Investors Call for the H1 2023 Financial Results
- Digi Communications N.V. announces the convocation of the Company’s general shareholders meeting for 18 August 2023 for the approval of, among others, the 2022 Annual Report
- “Art Is Our Weapon”: Artists in Exile Deploy Their Talents in Support of Peace, Justice for Ukraine
- Digi Communications N.V. announces the availability of the 2022 Annual Financial Report
- “AmsEindShuttle” nuevo servicio de transporte que conecta el aeropuerto de Eindhoven y Ámsterdam
- Un nuovo servizio navetta “AmsEindShuttle” collega l’aeroporto di Eindhoven ad Amsterdam
- Digi Communications N.V. announces the conclusion of an amendment agreement to the Facility Agreement dated 26 July 2021, by the Company’s Spanish subsidiary
- Digi Communications N.V. announces an amendment of the Company’s 2023 financial calendar
- iGulu F1: Brewing Evolution Unleashed
- Почему интерактивная «Карта мира» собрала ключевые антивоенные сообщества россиян по всему миру и становится для них важнейшим инструментом
- Hajj Minister meets EU ambassadors to Saudi Arabia
- Online Organizing Platform “Map of Peace” Emerges as Key Tool for Diaspora Activists
- Digi Communications N.V. announces that conditional stock options were granted to executive directors of the Company based on the general shareholders’ meeting approval from 18 May 2021
- Digi Communications N.V. announces the release of the Q1 2023 financial results
- AMBROSIA – A MULTIPLEXED PLASMO-PHOTONIC BIOSENSING PLATFORM FOR RAPID AND INTELLIGENT SEPSIS DIAGNOSIS AT THE POINT-OF-CARE
- Digi Communications NV announces Investors Call for the Q1 2023 Financial Results presentation
- Digi Communications N.V. announces the amendment of the Company’s 2023 financial calendar
- Digi Communications N.V. announces the conclusion of two Facilities Agreements by the Company’s Romanian subsidiary
- Digi Communications N.V. announces the conclusion of a Senior Facility Agreement by the Company’s Romanian subsidiary
- Patients as Partners Europe Returns to London and Announces Agenda Highlights
- GRETE PROJECT RESULTS PRESENTED TO TEXTILE INDUSTRY STAKEHOLDERS AT INTERNATIONAL CELLULOSE FIBRES CONFERENCE
- Digi Communications N.V. announces Digi Spain Telecom S.L.U., its subsidiary in Spain, entered into an investment agreement with abrdn to finance the roll out of a Fibre-to-the-Home (FTTH) network in Andalusia, Spain
- XSpline SPA / University of Linz (Austria): the first patient has been enrolled in the international multicenter clinical study for the Cardiac Resynchronization Therapy DeliveRy guided by non-Invasive electrical and VEnous anatomy assessment (CRT-DRIVE)
- Franklin Junction Expands Host Kitchen® Network To Europe with Digital Food Hall Pioneer Casper
- Unihertz a dévoilé un nouveau smartphone distinctif, Luna, au MWC 2023 de Barcelone
- Unihertz Brachte ein Neues, Markantes Smartphone, Luna, auf dem MWC 2023 in Barcelona
- Editor's pick archive....