Critical behavior and magnetic entropy change in Nd0.7Sr0.1Ba0.1Ca0.1MnO3−δ perovskite manganite
| hal.structure.identifier | Laboratoire Physico-chimie structurale | |
| dc.contributor.author | MTIRAOUI, N. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHENNABASAPPA, Madhu | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DECOURT, Rodolphe | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TOULEMONDE, Olivier | |
| hal.structure.identifier | Laboratoire de Recherche de Physique des Solides | |
| dc.contributor.author | DHAHRI, J. | |
| hal.structure.identifier | Laboratoire Physico-chimie structurale | |
| dc.contributor.author | OUMEZINE, M. | |
| dc.date.issued | 2016-01 | |
| dc.identifier.issn | 0272-8842 | |
| dc.description.abstractEn | The aim of our study was to investigate the critical exponents of Nd0.7Sr0.1Ba0.1Ca0.1MnO3−δ material around its paramagnetic to ferromagnetic phase transition. Reliable critical exponents i.e. β=0.355, γ=1.329, and δ=4.867 at the critical temperature TC=117 K were refined using modified Arrott plot and Kouvel–Fisher methods. The critical exponent δ=4.760±0.129 was further separately determined from the isothermal magnetization data. Finally these critical exponents fulfill the Widom scaling relation δ=1+γ/β. Based on these analysis, the magnetization–field–temperature (M–H–T) data around TC collapses into two independent curves obeying the single scaling equation M(H,ε)=|ε|βf±(H/|ε|β+γ), with ε=(T−TC)/TC is the reduced temperature. Once again, the critical exponents are confirmed by the field dependence of the magnetic entropy change relation ∆SM|T=TC ∞Hn with n=1+(β−1)/(β+1). The obtained critical exponents for Nd0.7Sr0.1Ba0.1Ca0.1MnO3−δ manganite are in accordance with the prediction of the 3D-Heisenberg model with short-range magnetic interactions. The temperature dependence of specific heat and magnetic entropy change ΔSM further supports second order PM–FM phase transition and shed light the A-site-disordered perovskite effect on the magnetocaloric properties. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Critical exponent | |
| dc.subject.en | Phase transition | |
| dc.subject.en | Manganites | |
| dc.title.en | Critical behavior and magnetic entropy change in Nd0.7Sr0.1Ba0.1Ca0.1MnO3−δ perovskite manganite | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.ceramint.2015.09.027 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Ceramics International | |
| bordeaux.page | 1036-1043 | |
| bordeaux.volume | 42 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01253167 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01253167v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ceramics%20International&rft.date=2016-01&rft.volume=42&rft.issue=1&rft.spage=1036-1043&rft.epage=1036-1043&rft.eissn=0272-8842&rft.issn=0272-8842&rft.au=MTIRAOUI,%20N.&CHENNABASAPPA,%20Madhu&DECOURT,%20Rodolphe&TOULEMONDE,%20Olivier&DHAHRI,%20J.&rft.genre=article |
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