Horsley Ezekiel, Rao Xin, Yi Sang Bum, Kim Young-June
Department of Physics, University of Toronto, Toronto, ON M5S 1A7, Canada.
Hefei National Laboratory for Physical Sciences at Microscale, Department of Physics, and Key Laboratory of Strongly-Coupled Quantum Matter Physics (CAS), University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Phys Condens Matter. 2022 Jan 24;34(13). doi: 10.1088/1361-648X/ac484c.
We report our study of cobalt (II) titanate, CoTiO, in which magnetic Co ions are replaced by non-magnetic ions. The antiferromagnetic ordering transition of CoTiOaround 37 K is described with ferromagnetic honeycomb layers coupled antiferromagnetically along the crystallographic-direction. The effect of magnetic dilution on the Néel temperature of this material is investigated through the doping of Znand Mgin place of Cofor various dilution levels up to+= 0.46 in CoZnMgTiO. Single phase polycrystalline samples have been synthesized and their structural and magnetic properties have been examined. A linear relation between dilution and the Néel temperature is observed over a wide doping range. A linear extrapolation would suggest that the required dilution level to suppress magnetic order is around+∼ 0.74, well beyond the classical percolation threshold. The implication of this observation for microscopic models for describing CoTiOis discussed.
