Tunnel magnetoresistance sensors with even-function resistance-magnetic field response

Tomoya Nakatani; Hirofumi Suto; Prabhanjan D. Kulkarni; Hitoshi Iwasaki; Yuya Sakuraba

doi:10.1117/12.2676597

5 October 2023 Tunnel magnetoresistance sensors with even-function resistance-magnetic field response

Tomoya Nakatani, Hirofumi Suto, Prabhanjan D. Kulkarni, Hitoshi Iwasaki, Yuya Sakuraba

Proceedings Volume PC12656, Spintronics XVI; PC1265610 (2023) https://doi.org/10.1117/12.2676597
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States

Abstract

We have developed tunnel magnetoresistance sensor structures that exhibit an even-function resistance-magnetic field response that is symmetric with respect to the sign of the external magnetic field. These devices are promising for encoder sensors for position and rotation detection and also important for ultra-sensitive magnetic field sensors in combination with the AC modulation technique using AC magnetic fields. From the analysis of the noise in these devices under AC modulation magnetic field, we found that although the 1/f noise with electrical origin is effectively suppressed, the magnetic 1/f noise is also transferred to around the frequency of the AC modulation.

Conference Presentation

Citation Download Citation

Tomoya Nakatani, Hirofumi Suto, Prabhanjan D. Kulkarni, Hitoshi Iwasaki, and Yuya Sakuraba "Tunnel magnetoresistance sensors with even-function resistance-magnetic field response", Proc. SPIE PC12656, Spintronics XVI, PC1265610 (5 October 2023); https://doi.org/10.1117/12.2676597

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