Lakhani, Archana ; Kushwaha, Pallavi ; Rawat, R. ; Kumar, Kranti ; Banerjee, A. ; Chaddah, P. (2010) Field dependence of temperature induced irreversible transformations of magnetic phases in Pr0.5Ca0.5Mn0.975Al0.025O3 crystalline oxide Journal of Physics: Condensed Matter, 22 (3). 032101_1-032101_5. ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/22/3/032101
Related URL: http://dx.doi.org/10.1088/0953-89884/22/3/032101
Abstract
Glass-like arrest has recently been reported in various magnetic materials. As in structural glasses, the kinetics of a first order transformation is arrested while retaining the higher entropy phase as a non-ergodic state. We show visual mesoscopic evidence of the irreversible transformation of the arrested antiferromagnetic-insulating phase in Pr0.5Ca0.5Mn0.975Al0.025O3 to its equilibrium ferromagnetic-metallic phase with an isothermal increase of magnetic field, similar to its iso-field transformation on warming. The magnetic field dependence of the non-equilibrium to equilibrium transformation temperature is shown to be governed by Le Chatelier's principle.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 84448 |
| Deposited On: | 27 Feb 2012 13:14 |
| Last Modified: | 27 Feb 2012 13:14 |
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