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X-ray and Neutron Diffraction Study of the Holmium-iron System

出版	University of Missouri--Rolla, 1971
URL	http://books.google.com.hk/books?id=pHdBOAAACAAJ&hl=&source=gbs_api

註釋"Neutron diffraction and x-ray powder studies have been made of holmium-iron intermetallic compounds. The magnetic moments of Ho and Fe are in good agreement with measured spontaneous magnetization assuming a ferrimagnetic model with the Ho moments antiparallel to the Fe moments. The magnetic moments of the Fe atoms are found to be localized and thus independent of the rare earth content in the alloys. In contrast to HoCo3, (00[cursive l]) type magnetic peaks in the neutron diffraction patterns are still prevalent at room temperature and gradually decrease as the Curie temperature is approached. This fact indicates that the easy direction of magnetization remains in the basal plane. The easy direction of magnetization at room temperature is found to be parallel with the cube edge in HoF2 and to lie in the basal plane in HoFe3 and Ho2Fe1--. The easy direction is parallel to the a-axis in Ho2Fe1--. It is parallel to the b-direction, i.e. 30° from an a-axis, in the HoFe3 hexagonal cell"--Abstract, leaf ii