Direct evidence of phase segregation and magnetic-field-induced structural transition in Nd0.5Sr0.5MnO3 by neutron diffraction

被引：122

作者：

Ritter, C

Mahendiran, R

Ibarra, MR

Morellon, L

Maignan, A

Raveau, B

Rao, CNR

机构：

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

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

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

[4] Indian Inst Sci, Solid State Struct Chem Unit, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.61.R9229

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present direct evidence of die phase segregation and magnetic-field-induced structural transition in Nd0.5Sr0.5MnO3 as proposed earlier [R. Mahendiran et al., Phys. Rev. Lett. 82, 2191 (1999)] for the collapse of the charge-ordered insulating state. The spontaneous (H=0) low-temperature phase at 125 K is found to be phase segregated into two different crystallographic structures and three magnetic phases: orthorhombic (Imma) ferromagnetic, orthorhombic (Imma) A-type antiferromagnetic, and monoclinic (P2(1)/m) charge-ordered CE-type antiferromagnetic phases. Under a field of H=6 T, the charge-ordered monoclinic phase collapses and completely transforms into the metallic ferromagnetic orthorhombic phase.

引用

页码：R9229 / R9232

页数：4

共 21 条

[1] First order nucleation of charge ordered domains in La0.5Ca0.5MnO3 detected by 139La and 55Mn NMR [J].