Effects of reduced dimensionality on spin dynamics in the layered perovskite La1.4Sr1.6Mn2O7

被引：32

作者：

Heffner, RH ^{[1
]}

MacLaughlin, DE

Nieuwenhuys, GJ

Kimura, T

Luke, GM

Tokura, Y

Uemura, YJ

机构：

[1] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA

[3] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands

[4] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 305, Japan

[5] Columbia Univ, Dept Phys, New York, NY 10027 USA

[6] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.81.1706

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report zero-field muon spin rotation data in single crystals of La1.4Sr1.6Mn2O7 for T = 5-325 K. The spin-lattice relaxation rate is spatially inhomogeneous below the 3D magnetic transition temperature T-C and anisotropic above T-C. We find evidence against 2D spin ordering or in-plane correlations above T-C. Additionally, the very slow spin fluctuations found below T-C in cubic (3D) perovskites like (La, Ca)MnO3 or (La, Sr)MnO3, and attributed to relatively small magnetoelastic polarons, are absent in La1.4Sr1.6Mn2O7. This suggests that the polaron size in the layered material is significantly larger than in the 3D perovskites. [S0031-9007(98)06898-7].

引用

页码：1706 / 1709

页数：4

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