Hysteresis and Anisotropic Magnetoresistance in Antiferromagnetic $N{d}_{2-x}C{e}_{x}Cu{O}_4$

Abstract

The out-of-plane resistivity (${\rho }_c$) and magnetoresistivity (MR) are studied in antiferromangetic (AF) $N{d}_{2-x}C{e}_{x}Cu{O}_4$ single crystals, which have three types of noncollinear antiferromangetic spin structures. The apparent signatures are observed in ${\rho }_c(T)$ 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 ${\rho }_c(T,B)$ and magnetic hysteresis in MR are observed at spin reorientation transition temperatures.

arXiv comment4 pages, 4 figures

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• Giant Anisotropy of Magnetoresistance and "Spin Valve" effect in Antiferromagnetic $N{d}_{2-x}C{e}_{x}Cu{O}_4$
• Magnetic phase diagram in Eu${}_{1-x}$La${}_x$Fe${}_2$As${}_2$ single crystals
• Magnetotransport evidence of irreversible spin reorientation in the collinear antiferromagnetic state of underdoped ${\mathrm{Nd}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_4$