Jimenez Valery Ortiz, Kalappattil Vijaysankar, Eggers Tatiana, Bonilla Manuel, Kolekar Sadhu, Huy Pham Thanh, Batzill Matthias, Phan Manh-Huong
Department of Physics, University of South Florida, Tampa, FL, 33620, USA.
Phenikaa Institute for Advanced Study, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi, 1000, Viet Nam.
Sci Rep. 2020 Mar 16;10(1):4789. doi: 10.1038/s41598-020-61798-2.
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.
二维（2D）范德华铁磁材料正成为超紧凑自旋电子纳米器件、纳米传感器和信息存储应用中很有前景的候选材料。我们最近在生长于石墨或二硫化钼衬底上的单层VSe中发现了强室温铁磁性，这为探索这类超薄磁体用于此类应用开辟了新机遇。在本文中，我们展示了一种新型磁传感器，它利用单层VSe薄膜作为高灵敏度磁芯。该传感器依赖于由包含铁磁VSe薄膜的软铁磁微丝线圈组成的LC电路的共振频率变化，该线圈置于外加直流磁场中。我们将灵敏度定义为传感器特性曲线的斜率df/dH，其中f是共振频率，H是外部磁场。该传感器的灵敏度达到了16×10 Hz/Oe的大值，使其成为广泛磁传感应用的潜在候选者。
