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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