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Hysteresis and Anisotropic Magnetoresistance in Antiferromagnetic $Nd_{2-x}Ce_xCuO_{4}$

X. H. Chen·C. H. Wang·G. Y. Wang·X. G. Luo·J. L. Luo·G. T. Liu·N. L. Wang
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Abstract

The out-of-plane resistivity ($ρ_c$) and magnetoresistivity (MR) are studied in antiferromangetic (AF) $Nd_{2-x}Ce_xCuO_{4}$ single crystals, which have three types of noncollinear antiferromangetic spin structures. The apparent signatures are observed in $ρ_c(T)$ measured at the zero-field and 14 T at the spin structure transitions, giving a definite evidence for the itinerant electrons directly coupled to the localized spins. One of striking feature is an anisotropy of the MR with a fourfold symmetry upon rotating the external field (B) within ab plane in the different phases, while twofold symmetry at spin reorientation transition temperatures. The intriguing thermal hysteresis in $ρ_c(T,B)$ and magnetic hysteresis in MR are observed at spin reorientation transition temperatures.

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X. H. Chen, C. H. Wang, G. Y. Wang, X. G. Luo, J. L. Luo, G. T. Liu, N. L. Wang. 2004-12-22. Hysteresis and Anisotropic Magnetoresistance in Antiferromagnetic $Nd_{2-x}Ce_xCuO_{4}$. https://doi.org/10.1103/physrevb.72.064517

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