Neutron scattering investigation of magnetic bilayer correlations in La1.2Sr1.8Mn2O7:: Evidence of canting above TC

被引：102

作者：

Osborn, R

Rosenkranz, S

Argyriou, DN

Vasiliu-Doloc, L

Lynn, JW

Sinha, SK

Mitchell, JF

Gray, KE

Bader, SD

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA

[3] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[4] Univ Maryland, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.81.3964

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Neutron scattering investigations of the paramagnetic correlations in the layered manganite La-1.2-Sr1.8Mn2O7, which exhibits colossal magnetoresistance above the Curie transition at T-C = 112 K, show that spins in neighboring layers within each bilayer are strongly canted at an average angle that is dependent on both the magnetic field and the temperature, as predicted by de Gennes. The inplane correlation length does not diverge at T-C, although the magnetic Bragg intensity obeys critical scaling below T-C, with the same temperature dependence as the zero-field electrical conductance. [S0031-9007(98)07520-6].

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页码：3964 / 3967

页数：4

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