Spin glass transition in MnO.
01 January 1984
What could possibly be new in MnO 46 years after the discovery of its antiferromagnetic transition?: a spin-glass transition in the 25-50K temperature range. The susceptibility of MnO powders obtained by various treatments (MnO aged 30 years in ambient atmosphere, MnO2 reduced at 500 and 1000C in hydrogen, MnO heated in air at 500C) was measured in low dc and ac magnetic fields and in a high dc magnetic field. The spin-glass behavior is linked to a slight off-stoichiometry: MnO(1+x) with X