Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully compensated half-metallic Mn2RuxGa thin films
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2018Access:
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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, and Alina Maria Deac, Magnetocrystalline anisotropy and exchange probed by high-field anomalous Hall effect in fully compensated half-metallic Mn2RuxGa thin films, PHYSICAL REVIEW B, 98, 2018, 220406(R)Download Item:
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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.
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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.220406http://hdl.handle.net/2262/90869
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/jcoeyhttp://people.tcd.ie/stamenp
http://people.tcd.ie/atchesog
http://people.tcd.ie/rodek
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Journal ArticleURI:
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.220406http://hdl.handle.net/2262/90869
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PHYSICAL REVIEW B98
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Anomalous Hall effect, Exchange interaction, Ferrimagnetism, Magnetic anisotropy, Magnetotransport, Half-metalsSubject (TCD):
FABRICATION , NANOSTRUCTURES , Nanotechnology , PhysicsDOI:
http://dx.doi.org/10.1103/PhysRevB.98.220406ISSN:
1098-0121Licences: