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Crossover of the dimensionality of 3d spin fluctuations in LaCoPO
, K. Ghoshray, A. Ghoshray, B. Bandyopadhyay, B. Pahari, S. Banerjee
Published in
Volume: 80
Issue: 21
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 TC. In contrast to isotropic hyperfine field, Hhf at the P 31 site in LaFePO, Hhf is anisotropic in LaCoPO. The data of spin-lattice relaxation rate also exhibit anisotropic spin fluctuation. The anisotropy vanishes near TC. {\textcopyright} 2009 The American Physical Society.
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