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2 PublicationsAnomalous Hall effect in fully compensated half-metallic Mn₂RuₓGa thin films
Fowley, C.; Rode, K.; Lau, Y. C.; Thiyagarajah, N.; Betto, D.; Borisov, K.; Atcheson, G.; Kampert, E.; Wang, Z.; Yuan, Y.; Zhou, S.; Lindner, J.; Stamenov, P.; Coey, J. M. D.; Deac, A. M.
Abstract
High-field magnetotransport is investigated in thin films of half-metallic ferrimagnet Mn₂RuₓGa. A non-vanishing Hall signal is observed over a broad temperature range, spanning the compensation temperature (155K), where the net magnetic moment is strictly zero, the Hall conductivity is 6673 Ohm⁻¹ m⁻¹ and the coercivity exceeds 9T. Molecular field modelling is used to determine the intra- and inter-sublattice exchange constants and from the spin-flop transition we infer the anisotropy of the electrically active sublattice to be 216 kJm⁻³ and predict the magnetic resonances 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.
Keywords: Ferrimagnetism; Magnetotransport; Half-metals; Anomalous Hall effect; Magnetic anisotropy; Exchange interaction
Involved research facilities
- High Magnetic Field Laboratory (HLD)
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Invited lecture (Conferences)
Intermag 2018, 23.-27.04.2018, Singapore, Singapore -
Physical Review B 98(2018), 220406(R)
DOI: 10.1103/PhysRevB.98.220406
Cited 20 times in Scopus
Downloads
- Final Draft PDF 2,2 MB Secondary publication
Permalink: https://www.hzdr.de/publications/Publ-27502