Antiparallel ordering of Mn and Nd magnetic moments in Nd0.7Ba0.3MnO3

被引：24

作者：

Fauth, F

Suard, E

Martin, C

Millange, F

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[2] ETH Zurich, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[4] Inst Sci Mat & Rayonnement, Lab CRISMAT, F-14050 Caen, France

来源：

PHYSICA B | 1997年 / 241卷

关键词：

neutron diffraction; magnetic structure; giant magnetoresistance;

D O I：

10.1016/S0921-4526(97)00610-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The crystal and magnetic structures of the giant magnetoresistive compound Nd0.7Ba0.3MnO3 have been investigated by means of neutron powder diffraction. The nuclear structure remains orthorhombic within the temperature range 1.5-300 K. As expected from the higher size of Ba-ion radii, the buckling as well as the distortion of MnO6 octahedra are less pronounced than in the parent compounds Nd(0.7)A'0.3MnO3 (A' = Ca, Sr). At 1.5 K, we observe a ferromagnetic ordering of both Nd and Mn magnetic moments along the b-axis. However, Nd and Mn moments point in opposite directions. The saturated magnetic moment of Mn ions is 3.45 mu(B), whereas the magnetic moment of Nd ions reaches 0.45 mu(B) at 1.5 K. The Curie temperatures are T-c(Mn) = 142 K and T-c(Nd) = 20 K. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：427 / 429

页数：3

共 3 条

[1] The manganite Nd0.5Sr0.5MnO3: A rare distortion of the perovskite [J].