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Magnetic transition...
Magnetic transitions with magnetocaloric effects near room temperature related to structural transitions in Y0.9Pr0.1Fe2D3.5 deuteride
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- Paul-Boncour, V (författare)
- Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France.
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- Herrero, A. (författare)
- Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France.;Univ Basque Country, UPV EHU, Dept Fis Aplicada 1, Escuela Ingn Bilbao, Plaza Torres Quevedo 1, Bilbao 48013, Spain.
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- Shtender, Vitalii (författare)
- Uppsala universitet,Oorganisk kemi,Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France
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- Provost, K. (författare)
- Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France.
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- Elkaim, E. (författare)
- SOLEIL, LOrme Merisiers, BP 48, F-91192 Gif Sur Yvette, France.
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Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France Univ Paris Est Creteil, ICMPE UMR7182, CNRS, 2 Rue Henri Dunant, F-94320 Thiais, France.;Univ Basque Country, UPV EHU, Dept Fis Aplicada 1, Escuela Ingn Bilbao, Plaza Torres Quevedo 1, Bilbao 48013, Spain. (creator_code:org_t)
- American Institute of Physics (AIP), 2021
- 2021
- Engelska.
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Ingår i: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 130:11
- Relaterad länk:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The structural and magnetic properties of Y0.9Pr0.1Fe2D3.5 deuteride have been investigated by synchrotron and neutron diffraction, magnetic measurements, and differential scanning calorimetry. Deuterium insertion induces a 23.5% cell volume increase and a lowering of crystal symmetry compared to the cubic C15 Y0.9Pr0.1Fe2 parent compound (Fd-3m SG). The deuteride is monoclinic (P2(1)/c SG) below 330 K and undergoes a first-order transition between 330 and 350 K toward a pseudo-cubic structure (R-3 m SG) with TO-D = 342(2) K. In both structures, the D atoms are located in 96% R2Fe2 and 4% RFe3 tetrahedral interstitial sites (R = Y0.9Pr0.1). The compound is ferromagnetic, accompanied by a magnetostrictive effect below T-C = 274 K. The analysis of the critical exponents indicates a second-order type transition with a deviation from the isotropic 3D Heisenberg model toward the 3D XY model. This implies an easy plane of magnetization in agreement with cell parameter variation showing planar magnetic orientation. A weak magnetic peak is even observed at the order-disorder transition with a maximum at 343 K. Magnetic entropy variations are characteristic of direct and inverse magnetocaloric effects at T-C and TO-D, respectively.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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