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
收藏
页码：R9229 / R9232
页数：4
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