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  Electrical resistivity and thermodynamic properties of the ferromagnet Nd2Pt2In

Tchokonte, M. B. T., Mboukam, J. J., Bashir, A. K. H., Sondezi, B. M., Kumar, K. R., Strydom, A. M., et al. (2018). Electrical resistivity and thermodynamic properties of the ferromagnet Nd2Pt2In. Journal of Alloys and Compounds, 753, 41-45. doi:10.1016/j.jallcom.2018.04.193.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-7B51-A Version Permalink: http://hdl.handle.net/21.11116/0000-0001-7B53-8
Genre: Journal Article

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Tchokonte, M. B. Tchoula1, Author
Mboukam, J. J.1, Author
Bashir, A. K. H.1, Author
Sondezi, B. M.1, Author
Kumar, K. Ramesh1, Author
Strydom, A. M.2, Author              
Kaczorowski, D.1, Author
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1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: The Nd2Pt2In compound was investigated by means of electrical resistivity rho(T), heat capacity C-p (T), magnetic susceptibility x(T), magnetization M(mu(0)(H) and magnetocaloric effect (MCE) measurements. The material orders ferromagnetically at T-C = 16 K with a second - order phase transition. In the ordered state, rho(T) can be represented in terms of ferromagnetic (FM) spin - wave dispersion with an energy gap Delta(R) = 13(1) K in zero field. In concert, the C-p(T) data in this region can be well described by the same model getting Delta(C) = 8(1) K in zero field. Above T-C, the rho(T) variation is characteristic of electron - phonon interaction in the presence of s - d scattering and crystalline-electric field (CEF). The 4f - electron specific heat shows a Schottky - type anomaly around 60 K associated with CEF. On the other hand, C-p(T) data of the non-magnetic homologue La2Pt2In can be described by the Debye - Einstein model, giving a Debye and Einstein temperature values of 190.3(5) K and 69.8(7) K respectively. At high temperatures, the x(T) data follows the Curie - Weiss relation with an effective magnetic moment mu(eff) = 3.61(2) mu(B) and a Weiss temperature theta(p) = 17(1) K. The magnitude of MCE was estimated from the isothermal magnetization data to be 6.25 J/(kg.K), 5.01 J/(kg.K), 3.18 J/(kg.K) and 0.47 J/(kg.K) for a field change of 7 T, 5 T, 3 T and 1 T, respectively. The characteristic behaviour of the isothermal magnetic entropy change points to a second order character of the FM phase transition. (C) 2018 Elsevier B.V. All rights reserved.

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Language(s): eng - English
 Dates: 2018-04-202018-04-20
 Publication Status: Published in print
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Title: Journal of Alloys and Compounds
  Abbreviation : J. Alloy. Comp.
Source Genre: Journal
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Publ. Info: Lausanne, Switzerland : Elsevier B.V.
Pages: - Volume / Issue: 753 Sequence Number: - Start / End Page: 41 - 45 Identifier: ISSN: 0925-8388
CoNE: /journals/resource/954925567746