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Magnetic and anomalous transport properties in Fe2MnAl |
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| Authors: | Zhuhong Liu Xingqiao MaFanbin Meng Guangheng Wu |
| Affiliation: | a Department of Physics, University of Science and Technology Beijing, Beijing 100083, China b School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China c Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
| Abstract: | This study investigated the magnetism and anomalous transport properties of the melt-spun ribbon Fe2MnAl alloy. It is found that the alloy exhibits ferromagnetic order with the Curie temperature of ∼150 K, followed by another magnetic transition at TR ∼ 51 K. It is suggested there is antiferromagnetism pinning effect on the ferromagnetic matrix at the temperature below TR. A steep rise of the resistance below TR has been observed, which can be understood in terms of antiferromagnetic scattering. An appearance of the resistance maximum near the Curie temperature and the negative temperature dependence of the resistance above Curie temperature are associated with the magnetic phase transition from ferromagnetism to paramagnetism. A negative magnetoresistance at low temperature arising from inhomogeneous magnetic scattering is reported. |
| Keywords: | Transport properties Melt-spinning Heusler alloys Magnetic properties Magnetoresistance |
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