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  Spin glass behavior in the disordered half-Heusler compound IrMnGa

Kroder, J., Manna, K., Kriegner, D., Sukhanov, A. S., Liu, E., Borrmann, H., et al. (2019). Spin glass behavior in the disordered half-Heusler compound IrMnGa. Physical Review B, 99(17): 174410, pp. 1-10. doi:10.1103/PhysRevB.99.174410.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-B25A-F Version Permalink: http://hdl.handle.net/21.11116/0000-0003-D369-9
Genre: Journal Article

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 Creators:
Kroder, Johannes1, Author              
Manna, Kaustuv1, Author              
Kriegner, Dominik1, Author              
Sukhanov, A. S.1, Author              
Liu, Enke1, Author              
Borrmann, Horst2, Author              
Hoser, Andreas3, Author
Gooth, Johannes4, Author              
Schnelle, Walter5, Author              
Inosov, Dmytro S.3, Author
Fecher, Gerhard H.6, Author              
Felser, Claudia7, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
3External Organizations, ou_persistent22              
4Nanostructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_3018212              
5Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
6Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
7Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Heusler compounds with heavy elements often display noncollinear magnetic structures, which can lead to phenomena such as the topological Hall effect. In this study, we report the structural, magnetic, electronic, and transport properties of IrMnGa. X-ray and neutron diffraction experiments reveal that the compound crystallizes in the cubic half-Heusler space group 216 with Y -type disorder. Manganese occupies two nonequivalent positions, causing frustration and preventing long-range magnetic order. As a consequence, a spin glass state is observed below 74 K. The spin glass state exhibits a pronounced bifurcation between field-cooled and zerofield-cooled magnetization curves, shifted hysteresis loops after field cooling, magnetic relaxation, the memory effect, absence of magnetic-ordering peaks in neutron diffraction, and a sharp cusp of the ac susceptibility. The shift of the freezing temperature as a function of ac frequency is well described by the Vogel-Fulcher law and by a critical-scaling approach indicating that IrMnGa is a canonical spin glass. Magnetotransport (including the anomalous Hall effect) and heat capacity were also investigated.

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Language(s): eng - English
 Dates: 2019-05-132019-05-13
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 99 (17) Sequence Number: 174410 Start / End Page: 1 - 10 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008