Crossover of the dimensionality of 3d spin fluctuations in LaCoPO

被引：16

作者：

Majumder, M. ^{[1
]}

Ghoshray, K. ^{[1
]}

Ghoshray, A. ^{[1
]}

Bandyopadhyay, B. ^{[1
]}

Pahari, B. ^{[1
]}

Banerjee, S. ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, Kolkata 700064, India

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 21期

关键词：

cobalt compounds; ferromagnetism; iron compounds; lanthanum compounds; magnetic anisotropy; magnetisation; nuclear magnetic resonance; spin fluctuations; spin-lattice relaxation; CRYSTAL-STRUCTURE; SUPERCONDUCTIVITY;

D O I：

10.1103/PhysRevB.80.212402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

dc magnetization and P-31 spin-lattice relaxation rate in the polycrystalline sample of LaCoPO suggest a spin-fluctuation dominated ferromagnetically ordered state. Moreover, NMR data clearly indicate a crossover from two-dimensional to three-dimensional spin fluctuations across T-C. In contrast to isotropic hyperfine field, H-hf at the P-31 site in LaFePO, H-hf is anisotropic in LaCoPO. The data of spin-lattice relaxation rate also exhibit anisotropic spin fluctuation. The anisotropy vanishes near T-C.

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页数：4

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