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Anomalous Hall effect in Fe/Gd bilayers

2010; Institute of Physics; Volume: 90; Issue: 2 Linguagem: Inglês

10.1209/0295-5075/90/27004

1286-4854

Wenjin Xu, Baoping Zhang, Zheng-Xin Liu, Zhe Wang, Weiyu Li, Z. B. Wu, Rong Yu, Xixiang Zhang,

Chemical and Physical Properties of Materials

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.