A magnetic sensor using a 2D van der Waals ferromagnetic material

Two-dimensional (2D) van der Waals ferromagnetic materials are emerging as promising candidates for applications in ultra-compact spintronic nanodevices, nanosensors, and information storage. Our recent discovery of the strong room temperature ferromagnetism in single layers of VSe grown on graphite...

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Bibliographic Details
Published in:Scientific reports 2020-03, Vol.10 (1), p.4789-4789, Article 4789
Main Authors: Jimenez, Valery Ortiz, Kalappattil, Vijaysankar, Eggers, Tatiana, Bonilla, Manuel, Kolekar, Sadhu, Huy, Pham Thanh, Batzill, Matthias, Phan, Manh-Huong
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Information storage
Magnetic fields
Magnetism
Molybdenum disulfide
Sensors
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Summary:Two-dimensional (2D) van der Waals ferromagnetic materials are emerging as promising candidates for applications in ultra-compact spintronic nanodevices, nanosensors, and information storage. Our recent discovery of the strong room temperature ferromagnetism in single layers of VSe grown on graphite or MoS substrate has opened new opportunities to explore these ultrathin magnets for such applications. In this paper, we present a new type of magnetic sensor that utilizes the single layer VSe film as a highly sensitive magnetic core. The sensor relies in changes in resonance frequency of the LC circuit composed of a soft ferromagnetic microwire coil that contains the ferromagnetic VSe film subject to applied DC magnetic fields. We define sensitivity as the slope of the characteristic curve of our sensor, df /dH, where f is the resonance frequency and H is the external magnetic field. The sensitivity of the sensor reaches a large value of 16 × 10  Hz/Oe, making it a potential candidate for a wide range of magnetic sensing applications.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-61798-2