Mahendiran, R. ; Ibarra, M. R. ; Marquina, C. ; Garcia-Landa, B. ; Morellon, L. ; Maignan, A. ; Raveau, B. ; Arulraj, A. ; Rao, C. N. R. (2003) Giant anisotropic magnetostriction in Pr0.5Sr0.5MnO3 Applied Physics Letters, 82 (2). pp. 242-244. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v82/i2/p242_s...
Related URL: http://dx.doi.org/10.1063/1.1537454
Abstract
We show that the polycrystalline perovskite antiferromagnet Pr0.5Sr0.5MnO3 exhibits a giant anisotropic magnetostriction (λt=1.5×10−3 at T=25 K and H=14.2 T) contrary to much smaller λt (<0.1×10−3) found in most other three-dimensional manganites. The value of λt decreases rapidly as the Néel temperature is approached from below, but an unusually high value of λt is also found below the ferromagnetic Curie temperature. We suggest that the magnetic-field-induced antiferromagnetic-to-ferromagnetic transition is accompanied by a structural transition from orthorhombic to tetragonal symmetry and attribute the giant anisotropic effect to the preferential growth of the orbital disordered tetragonal (ferromagnetic) domains along the field direction in the eg-dx2−y2 orbital ordered orthorhombic (antiferromagnetic) matrix.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Praseodymium Compounds; Strontium Compounds; Magnetostriction; Magnetic Anisotropy; Ferromagnetic-antiferromagnetic Transitions; Solid-state Phase Transformations |
| ID Code: | 43445 |
| Deposited On: | 11 Jun 2011 13:04 |
| Last Modified: | 11 Jun 2011 13:04 |
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