Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite
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...
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| Дата: | 2012 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2012
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| Назва видання: | Физика низких температур |
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| Цитувати: | 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. |
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irk-123456789-1172742017-05-22T03:03:39Z Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite Feher, A. Desnenko, V. Fertman, E. Dolya, S. Kajňaková, M. Beznosov, A. Магнетизм 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. 2012 Article 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. 0132-6414 PACS: 64.75.–g, 75.50.Lk, 75.30.–m,75.47.Lx, 77.22.Gm http://dspace.nbuv.gov.ua/handle/123456789/117274 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| topic |
Магнетизм Магнетизм |
| spellingShingle |
Магнетизм Магнетизм Feher, A. Desnenko, V. Fertman, E. Dolya, S. Kajňaková, M. Beznosov, A. Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite Физика низких температур |
| description |
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. |
| format |
Article |
| author |
Feher, A. Desnenko, V. Fertman, E. Dolya, S. Kajňaková, M. Beznosov, A. |
| author_facet |
Feher, A. Desnenko, V. Fertman, E. Dolya, S. Kajňaková, M. Beznosov, A. |
| author_sort |
Feher, A. |
| title |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite |
| title_short |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite |
| title_full |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite |
| title_fullStr |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite |
| title_full_unstemmed |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite |
| title_sort |
direct evidence of the low-temperature cluster-glass magnetic state of nd²/₃ca¹/₃mno₃ perovskite |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| publishDate |
2012 |
| topic_facet |
Магнетизм |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/117274 |
| citation_txt |
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. |
| series |
Физика низких температур |
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2023-10-18T20:29:25Z |
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