Antiferromagnetism of the Spinel MnGa2O4
- 1 March 1966
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 37 (3) , 960-961
- https://doi.org/10.1063/1.1708538
Abstract
The cubic spinel MnGa2O4 is partially inverse with 87% of the Mn atoms on tetrahedral A sites. Neutron diffraction with a powder has shown that, at low temperatures, the spin moments on A sites are antiferromagnetically coupled (TN =33°K). The variation of the (200) magnetic reflection as a function of the magnetic field allows the determination of both the direction of the magnetic moments along [111] and the value (K 1=−4.104 erg/cm3) of the anisotropy constant. The 1/χ(T) curve does not show the typical minimum at the Néel point but instead decreases rapidly at low temperatures. We explain that phenomenon by taking into account the paramagnetism of the spins on octahedral sites.This publication has 0 references indexed in Scilit: