La-139 NMR investigation of spin ordering in La0.5Ca0.5MnO3

被引：47

作者：

Papavassiliou, G

Fardis, M

Milia, F

Simopoulos, A

Kallias, G

Pissas, M

Niarchos, D

Ioannidis, N

Dimitropoulos, C

Dolinsek, J

机构：

[1] ECOLE POLYTECH FED LAUSANNE,PHB ECUBLENS,INST PHYS EXPT,CH-1015 LAUSANNE,SWITZERLAND

[2] JOZEF STEFAN INST,LJUBLJANA 61111,SLOVENIA

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.55.15000

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La-139 NMR in a zero external magnetic field has been used as a probe in order to study the Mn spin ordering of La0.5Ca0.5MnO3. For T<T-c two different spin configurations are detected, assigned to a ferromagnetic and an antiferromagnetic one, which persist down to the lowest measured temperature T = 90 K. Close to T-c strong coherent spin fluctuations are detected that presumably drive the paramagnetic-to-ferromagnetic phase transition. Complementary magnetic and Mn4+ electron paramagnetic resonance measurements are in agreement with the with NMR results.

引用

页码：15000 / 15004

页数：5

共 28 条

[1] INFLUENCE OF RF FIELD STRENGTH ON SPIN-ECHO INTENSITY OF NI-61 RESONANCE IN POWDERED NICKEL [J].