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  Complex magnetic phase diagram of metamagnetic MnPtSi

Gamża, M. B., Schnelle, W., Rosner, H., Ackerbauer, S.-V., Grin, Y., & Leithe-Jasper, A. (2019). Complex magnetic phase diagram of metamagnetic MnPtSi. Physical Review B, 100(1): 014423, pp. 1-10. doi:10.1103/PhysRevB.100.014423.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-75E2-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-75E4-7
Genre: Journal Article

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 Creators:
Gamża, M. B.1, Author              
Schnelle, W.2, Author              
Rosner, H.3, Author              
Ackerbauer, S.-V.1, Author              
Grin, Yu.4, Author              
Leithe-Jasper, A.5, Author              
Affiliations:
1Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
2Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
3Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
4Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              
5Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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 Abstract: The magnetic, thermal, and transport properties as well as electronic band structure of MnPtSi are reported. MnPtSi is a metal that undergoes a ferromagnetic transition at T-c = 340(1) K and a spin-reorientation transition at T-N = 326(1) K to an antiferromagnetic phase. First-principles electronic structure calculations indicate a not-fully polarized spin state of Mn in a d(5) electron configuration with J = S = 3/2, in agreement with the saturation magnetization of 3 mu(B) in the ordered state and the observed paramagnetic effective moment. A sizable anomalous Hall effect in the antiferromagnetic phase alongside the computational study suggests that the antiferromagnetic structure is noncollinear. Based on thermodynamic and resistivity data we construct a magnetic phase diagram. Magnetization curves M(H) at low temperatures reveal a metamagnetic transition of spin-flop type. The spin-flopped phase terminates at a critical point with T-cr approximate to 300 K and H-cr approximate to 10 kOe, near which a peak of the magnetocaloric entropy change is observed. Using Arrott plot analysis and magnetoresistivity data we argue that the metamagnetic transition is of a first-order type, whereas the strong field dependence of T-N and the linear relationship of the T-N with M-2 hint at its magnetoelastic nature.

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Language(s): eng - English
 Dates: 2019-07-192019-07-19
 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: 100 (1) Sequence Number: 014423 Start / End Page: 1 - 10 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008