Volume 113, Number 4, February 2016
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||08 March 2016|
Extraordinary galvanomagnetic effects in polycrystalline magnetic films
1 Physics Department, The Hong Kong University of Science and Technology - Clear Water Bay, Kowloon, Hong Kong
2 HKUST Shenzhen Research Institute - Shenzhen 518057, China
3 School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China Chengdu, Sichuan 610054, China
Received: 10 November 2015
Accepted: 25 February 2016
Based on the general requirement that all nature laws can be expressed in a tensor form, three new extraordinary galvanomagnetic effects in polycrystalline magnetic films, which differ from the known anomalous Hall effect and anisotropic magnetoresistance, are predicted. In general, a current perpendicular to a film can generate an electric field along the magnetization direction. Reversely, a current parallel to the magnetization can generate an electric field in the vertical direction of a film. The third extraordinary galvanomagnetic effect is that the longitudinal resistivity should depend on the magnetization component perpendicular to a film. One of the fingerprints of these effects is that the longitudinal resistance of a film is different when the current reverses its direction, and/or the in-plane longitudinal resistance is different when the perpendicular component of magnetization reverses its direction.
PACS: 72.20.My – Galvanomagnetic and other magnetotransport effects / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 85.75.-d – Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields
© EPLA, 2016
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