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 mag...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2012 |
| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2012
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| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/117274 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| 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. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | 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.
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| ISSN: | 0132-6414 |