Application of Spin-Wave Theory to EuS
作者： S. H. Charap , E. L. Boyd
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摘要: Magnetization data for EuS powder in zero field and at liquid-helium temperatures were obtained by nuclear magmetic resonance of both the Eu/sup 151/ 153/ nuclei. These are considered simultaneously with those specific heat McCollum Callaway order to provide a more definitive application spin-wave theory this material. The is that given Holstein Primakoff special attention effects magnetic dipolar coupling on energy moment. calculation was carried out summation over exact Brillouin zone. Values nearest-neighbor exchange interaction J/sub 1/ second-neighbor 2/, as well an effective H, which produced reasonable agreement between experiment, = 0.20 plus or minus 0.01 deg K, 2/ =-0.08 0.02 K H 4.0 0.2 kOe. values fairly consistent other parameters known EuS. (auth)
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