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Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite

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dc.contributor.author Feher, A.
dc.contributor.author Desnenko, V.
dc.contributor.author Fertman, E.
dc.contributor.author Dolya, S.
dc.contributor.author Kajňaková, M.
dc.contributor.author Beznosov, A.
dc.date.accessioned 2017-05-21T17:27:01Z
dc.date.available 2017-05-21T17:27:01Z
dc.date.issued 2012
dc.identifier.citation Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite / A. Feher, V. Desnenko, E. Fertman, S. Dolya, M. Kajňaková, A. Beznosov // Физика низких температур. — 2012. — Т. 38, № 7. — С. 828-832 . — Бібліогр.: 19 назв. — англ. uk_UA
dc.identifier.issn 0132-6414
dc.identifier.other PACS: 64.75.–g, 75.50.Lk, 75.30.–m,75.47.Lx, 77.22.Gm
dc.identifier.uri http://dspace.nbuv.gov.ua/handle/123456789/117274
dc.description.abstract In the presented study we have revealed a giant exchange bias in a colossal magnetoresistance Nd²/₃Ca¹/₃MnO₃ perovskite at low temperatures, evident of an intrinsic exchange coupling in this compound. The phenomena found confirms our previous assumption that the low-temperature magnetic structure of the compound is represented by small (nanosized) ferromagnetic clusters immersed within the charge-ordered antiferromagnetic matrix. Magnetic behavior of the Nd²/₃Ca¹/₃MnO₃ perovskite is consistent with a cluster-glass magnetic state and does not agree with a classical spin-glass state observed in a variety of disordered magnetic systems. We think that the cluster-glass magnetic behavior of Nd²/₃Ca¹/₃MnO₃ originates from the selforganized phase-separated state of the compound. The Cole-Cole analysis of the dynamic susceptibility at lowtemperatures has shown extremely broad distribution of relaxation times, indicating that spins are frozen at a “macroscopic” time scale. Slow relaxation of the zero-field-cooled magnetization has been experimentally revealed as well. This slow relaxation confirms the cluster-glass magnetic state of the compound. Two strongly different relaxation mechanisms were found: the first one is characteristic for temperatures below the freezing temperature Tg ∼ 60 K, the second one is characteristic for higher temperatures. uk_UA
dc.description.sponsorship This paper is dedicated to Professor Viktor Valentinovich Eremenko on the occasion of his 80th birthday. One of authors (A.F.) is very thankful to Prof. Eremenko for decades of fruitful collaboration. Viktor Valentinovich was and still is an excellent mentor in the field of magnetism for the whole Košice Low Temperature Group. Authors are thankful to Dr. D. Sheptyakov (PSI, Switzerland) and to Dr. D. Khalyavin (ISIS, United Kingdom) for fruitful collaboration. This work was supported by the SAS Centre of Excellence CFNT MVEP, by the ERDF EU (European Union European regional development fund) grant under the contract No. TMS26220120005 and by the Slovak Grant Agency VEGA-1/0159/09. The financial support of U.S. Steel Košice is gratefully acknowledged. uk_UA
dc.language.iso en uk_UA
dc.publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України uk_UA
dc.relation.ispartof Физика низких температур
dc.subject Магнетизм uk_UA
dc.title Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite uk_UA
dc.type Article uk_UA
dc.status published earlier uk_UA

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