The crystal structure of the Sr2Zn2Fe28O46 hexagonal ferrite has been refined from X-ray single crystal data. The crystallographic parameters are: a = 5.884(3) A ̊, c = 83.678(6) A ̊; density ρ{variant} = 5.17 g/cm3 and space group R3m with three formula units per cell. The Zn2+ ions were found in the tetrahedral sites of S blocks and in the octahedral sites of R blocks. Following this cation distribution the Bohr magneton value deducible from the collinear Gorter scheme is 56μB versus an experimental value of (53.7±1.4)μB. The main magnetic properties of Sr2Zn2Fe28O46 single crystals are: saturation magnetization 82.5 and 108 emu/g at room temperature (RT) and liquid nitrogen, respectively; anisotropy field is 12.3 kOe at RT; Curie temperature is 430°C.
Crystal Structure and Magnetic Characterization of Sr2Zn2Fe28O46(SrZn-X) Hexaferrite Single Crystal / F., Leccabue; R., Panizzieri; G., Bocelli; Calestani, Gianluca; Rizzoli, Corrado; N., Suarez Almodovar. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 68:(1987), pp. 365-373. [10.1016/0304-8853(87)90015-1]
Crystal Structure and Magnetic Characterization of Sr2Zn2Fe28O46(SrZn-X) Hexaferrite Single Crystal
CALESTANI, Gianluca;RIZZOLI, Corrado;
1987-01-01
Abstract
The crystal structure of the Sr2Zn2Fe28O46 hexagonal ferrite has been refined from X-ray single crystal data. The crystallographic parameters are: a = 5.884(3) A ̊, c = 83.678(6) A ̊; density ρ{variant} = 5.17 g/cm3 and space group R3m with three formula units per cell. The Zn2+ ions were found in the tetrahedral sites of S blocks and in the octahedral sites of R blocks. Following this cation distribution the Bohr magneton value deducible from the collinear Gorter scheme is 56μB versus an experimental value of (53.7±1.4)μB. The main magnetic properties of Sr2Zn2Fe28O46 single crystals are: saturation magnetization 82.5 and 108 emu/g at room temperature (RT) and liquid nitrogen, respectively; anisotropy field is 12.3 kOe at RT; Curie temperature is 430°C.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
