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Anisotropic magnetoresistance in the itinerant antiferromagnetic EuTiO3

Kaveh Ahadi, Xuezeng Lu, Salva Salmani-Rezaie, Patrick B. Marshall, James M. Rondinelli, and Susanne Stemmer
Phys. Rev. B 99, 041106(R) – Published 7 January 2019
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Abstract

We report on measurements of the anisotropic magnetoresistance (AMR) of doped EuTiO3. It is shown that the primary contribution to the AMR is the crystalline component, which depends on the relative orientation between the magnetic moments and the crystal axes. With increasing magnetic field, a fourfold crystalline AMR undergoes a change in its alignment with respect to the crystal axes. The results are discussed in the context of the coupling between spin canting, electronic structure, and transport. We discuss the potential role of Weyl points in the band structure. At high fields, the AMR transitions to uniaxial symmetry, which is lower than that of the lattice, along with a crossover from positive to negative magnetoresistance.

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  • Received 4 November 2018

DOI:https://doi.org/10.1103/PhysRevB.99.041106

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Kaveh Ahadi1,*, Xuezeng Lu2, Salva Salmani-Rezaie1, Patrick B. Marshall1, James M. Rondinelli2, and Susanne Stemmer1

  • 1Materials Department, University of California, Santa Barbara, California 93106-5050, USA
  • 2Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA

  • *kahadi@mrl.ucsb.edu

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Issue

Vol. 99, Iss. 4 — 15 January 2019

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