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Magnetotransport evidence for irreversible spin reorientation in the collinear antiferromagnetic state of underdoped Nd2-xCexCuO4

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Helm,  T.
Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Dorantes, A., Alshemi, A., Huang, Z., Erb, A., Helm, T., & Kartsovnik, M. V. (2018). Magnetotransport evidence for irreversible spin reorientation in the collinear antiferromagnetic state of underdoped Nd2-xCexCuO4. Physical Review B, 97(5): 054430, pp. 1-8. doi:10.1103/PhysRevB.97.054430.


Cite as: https://hdl.handle.net/21.11116/0000-0000-DB9E-8
Abstract
We make use of the strong spin-charge coupling in the electron-doped cuprate Nd2-xCexCuO4 to probe changes in its spin system via magnetotransport measurements. We present a detailed study of the out-of-plane magnetoresistance in underdoped single crystals of this compound, including the nonsuperconducting, 0.05 <= x <= 0.115, and superconducting, 0.12 <= x <= 0.13, compositions. Special focus is put on the dependence of the magnetoresistance on the field orientation in the plane of the CuO2 layers. In addition to the kink at the field-induced transition between the noncollinear and collinear antiferromagnetic configurations, a sharp irreversible feature is found in the angle-dependent magnetoresistance of all samples in the high-field regime, at field orientations around the Cu-O-Cu direction. The obtained behavior can be explained in terms of field-induced reorientation of Cu2+ spins within the collinear antiferromagnetic state. It is therefore considered an unambiguous indication of the long-range magnetic order.