Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully compensated half-metallic Mn2RuxGa thin films

Ciarán Fowley, Karsten Rode, Yong Chang Lau, Naganivetha Thiyagarajah, Davide Betto, Kiril Borisov, Gwenaël Atcheson, Erik Kampert, Zhaosheng Wang, Ye Yuan, Shengqiang Zhou, Jürgen Lindner, Plamen Stamenov, J. M.D. Coey, Alina Maria Deac

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Magnetotransport is investigated in thin films of the half-metallic ferrimagnet Mn2RuxGa in pulsed magnetic fields of up to 58 T. A nonvanishing Hall signal is observed over a broad temperature range, spanning the compensation temperature (155 K), where the net magnetic moment is strictly zero, the anomalous Hall conductivity is 6673Ω-1m-1, and the coercivity exceeds 9T. Molecular field modeling is used to determine the intra- and intersublattice exchange constants, and from the spin-flop transition we infer the anisotropy of the electrically active sublattice to be 216kJm-3 and predict the magnetic resonance frequencies. Exchange and anisotropy are comparable and hard-axis applied magnetic fields result in a tilting of the magnetic moments from their collinear ground state. Our analysis is applicable to collinear ferrimagnetic half-metal systems.

Original languageEnglish
Article number220406
JournalPhysical Review B
Volume98
Issue number22
DOIs
Publication statusPublished - 2018 Dec 12
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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