Neutron diffraction study on the structure of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) was carried out.Data refinements show that the average subcell structure for Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) is in the best fit...Neutron diffraction study on the structure of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) was carried out.Data refinements show that the average subcell structure for Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) is in the best fit of the space group Fmmm and the structure is described by alternate stacking of SrO-CuO_(2)-Ca-CuO_(2)-SrO slab and a double BiO layers.An oxygen layer sandwiched by the bismuth layers was conRrmed.展开更多
Using neutron diffraction and magnetic measurement,we have measured the canting angle of the iron spin in Nd_(15)Fe_(78)B_(7) compound with powder samples.The iron spins rotate away from the c-axis by 26°34'a...Using neutron diffraction and magnetic measurement,we have measured the canting angle of the iron spin in Nd_(15)Fe_(78)B_(7) compound with powder samples.The iron spins rotate away from the c-axis by 26°34'at 77K.展开更多
基金Supported by the National Natural Science Foundation of Chinathe National Center for Research and Development on Superconductivity.
文摘Neutron diffraction study on the structure of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) was carried out.Data refinements show that the average subcell structure for Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) is in the best fit of the space group Fmmm and the structure is described by alternate stacking of SrO-CuO_(2)-Ca-CuO_(2)-SrO slab and a double BiO layers.An oxygen layer sandwiched by the bismuth layers was conRrmed.
文摘Using neutron diffraction and magnetic measurement,we have measured the canting angle of the iron spin in Nd_(15)Fe_(78)B_(7) compound with powder samples.The iron spins rotate away from the c-axis by 26°34'at 77K.
