Volume 90, Number 2, April 2010
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||11 May 2010|
Anomalous Hall effect in Fe/Gd bilayers
Department of Physis and Institute of Nanoscience & Technology, The Hong Kong University of Science and Technology (HKUST) - Clear Water Bay, Kowloon, Hong Kong, PRC
2 Image-characterization Core Lab, Research and Development, 4700 King Abdullah University of Science and Technology (KAUST) - Thuwal 23900-6900, Kingdom of Saudi Arabia
3 Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University Beijing 100084, PRC
4 School of Materials Science and Engineering, Beihang University - Beijing 100191, PRC
Corresponding author: Xixiang.Zhang@kaust.edu.sa
Accepted: 7 April 2010
Non-monotonic dependence of anomalous Hall resistivity on temperature and magnetization, including a sign change, was observed in Fe/Gd bilayers. To understand the intriguing observations, we fabricated the Fe/Gd bilayers and single layers of Fe and Gd simultaneously. The temperature and field dependences of longitudinal resistivity, Hall resistivity and magnetization in these films have also been carefully measured. The analysis of these data reveals that these intriguing features are due to the opposite signs of Hall resistivity/or spin polarization and different Curie temperatures of Fe and Gd single-layer films.
PACS: 72.15.Gd – Galvanomagnetic and other magnetotransport effects / 73.61.-r – Electrical properties of specific thin films / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces
© EPLA, 2010
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