Crossover of the dimensionality of 3d spin fluctuations in LaCoPO
arXiv:0909.0876 · doi:10.1103/PhysRevB.80.212402
Abstract
dc magnetization and 31^P 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 2D to 3D spin fluctuations across T_C. In contrast to isotropic hyperfine field, H_hf at the 31^P 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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- Study of electron spin dynamics in grain aligned LaCoPO: an itinerant ferromagnet
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