Giant anisotropic magnetostriction in Pr0.5Sr0.5MnO3

被引：18

作者：

Mahendiran, R

Ibarra, MR

Marquina, C

Garcia-Landa, B

Morellon, L

Maignan, A

Raveau, B

Arulraj, A

Rao, CNR

机构：

[1] Univ Zaragoza, CSIC, Dept Fis Mat Condensada, ICMA, E-50009 Zaragoza, Spain

[2] Univ Caen, ISMRA, Lab CRISMAT, F-14050 Caen, France

[3] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

来源：

APPLIED PHYSICS LETTERS | 2003年 / 82卷 / 02期

关键词：

Antiferromagnetic materials - Magnetic anisotropy - Magnetic domains - Magnetic field effects - Perovskite - Phase transitions - Polycrystalline materials - Praseodymium compounds - Thermal effects;

D O I：

10.1063/1.1537454

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We show that the polycrystalline perovskite antiferromagnet Pr0.5Sr0.5MnO3 exhibits a giant anisotropic magnetostriction (lambda(t)=1.5x10(-3) at T=25 K and H=14.2 T) contrary to much smaller lambda(t) (<0.1x10(-3)) found in most other three-dimensional manganites. The value of lambda(t) decreases rapidly as the Neel temperature is approached from below, but an unusually high value of lambda(t) 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 e(g)-d(x)(2)-y(2) orbital ordered orthorhombic (antiferromagnetic) matrix. (C) 2003 American Institute of Physics.

引用

页码：242 / 244

页数：3