Ontology type: schema:MonetaryGrant
2013-2015
FUNDING AMOUNT300000.0 CNY
ABSTRACTThe origin of spin glass in geometrically frustrated magnets is still unknown and needs to be clarified. ZnCr2O4, as a typical material in geometrically frustrated magnets of AB2O4, is employed in this project. The ionic diluted disorder and the exchange-interaction disorder (bond disorder) are introduced by doping the nonmagnetic and magnetic ions with similar radii in ZnCr2O4, respectively. Advanced artificial intelligence atmosphere-controllable furnace is used to synthesize the high-quality sample. The designed magnetic experiments are carried out in magnetic properties measurement system (MPMS). The dc and ac magnetic properties are measured to investigate the detailed magnetic structure and spin relaxation of system. The theoretical models, such as critical-power law and so on, are employed to study the spin dynamics of spin glass in geometrially frustrated magnets. Then, the project clarifies the machanism of spin glass induced by these two disorders. Through doping the ions with appropriately different radii in ZnCr2O4, the lattices are changed to study the influence of spin-lattice coupling on the formation of spin glass. Finally, the project clarifies whether there is the difference between spin glass in geometrically frustrated magnets and conventional spin glass. More... »
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