Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Direct evidence of the low-temperature cluster-glass magnetic state of Nd²/₃Ca¹/₃MnO₃ perovskite
|
|
| Creator |
Feher, A.
Desnenko, V. Fertman, E. Dolya, S. Kajňaková, M. Beznosov, A. |
|
| Subject |
Магнетизм
|
|
| 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. |
|
| Date |
2017-05-21T17:27:01Z
2017-05-21T17:27:01Z 2012 |
|
| Type |
Article
|
|
| Identifier |
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 |
|
| Language |
en
|
|
| Relation |
Физика низких температур
|
|
| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
|
|