In order to explore an "anomalous" conduction phenomenon in the system Zn(1-x)FeCrO4Nix which was investigated with Mossbauer spectra, X-rays diffraction, Infrared spectra and other methods. The results show...In order to explore an "anomalous" conduction phenomenon in the system Zn(1-x)FeCrO4Nix which was investigated with Mossbauer spectra, X-rays diffraction, Infrared spectra and other methods. The results show that the conductivity anomaly is not an intrinsic behavior but arises from the moisture-adsorption. Their native conduction is similar to that of semiconductors, obeying the relationship σ= σ∞ exp (Ea/KT). All samples crystallize in cubic symmetry and their lattice parameters increase with x. The cation distribution is ( Zn(1-x)Fex) [Fe(1-x)NixCr]O4 No phase change occurs in the temperature range from 283 to 423 K.展开更多
The magnetic properties of （Cox Fe1-x）A （Zn1-x Fe1＋x）B O4 are studied using mean-field theory and the probability distribution law to obtain the saturation magnetization, the coercive field, the critical temperat...The magnetic properties of （Cox Fe1-x）A （Zn1-x Fe1＋x）B O4 are studied using mean-field theory and the probability distribution law to obtain the saturation magnetization, the coercive field, the critical temperature, and the exchange interactions with different values of D （nm） and x. High-temperature series expansions （HTSEs） combined with the Pade approximant are used to calculate the critical temperature of （CoxFe1-x）A（Znl-xFe1＋x）BO4, and the critical exponent associated with magnetic susceptibility is obtained.展开更多
文摘In order to explore an "anomalous" conduction phenomenon in the system Zn(1-x)FeCrO4Nix which was investigated with Mossbauer spectra, X-rays diffraction, Infrared spectra and other methods. The results show that the conductivity anomaly is not an intrinsic behavior but arises from the moisture-adsorption. Their native conduction is similar to that of semiconductors, obeying the relationship σ= σ∞ exp (Ea/KT). All samples crystallize in cubic symmetry and their lattice parameters increase with x. The cation distribution is ( Zn(1-x)Fex) [Fe(1-x)NixCr]O4 No phase change occurs in the temperature range from 283 to 423 K.
文摘The magnetic properties of （Cox Fe1-x）A （Zn1-x Fe1＋x）B O4 are studied using mean-field theory and the probability distribution law to obtain the saturation magnetization, the coercive field, the critical temperature, and the exchange interactions with different values of D （nm） and x. High-temperature series expansions （HTSEs） combined with the Pade approximant are used to calculate the critical temperature of （CoxFe1-x）A（Znl-xFe1＋x）BO4, and the critical exponent associated with magnetic susceptibility is obtained.
