High temperature spin-freezing transition in Pyrochlore Eu2Ti2O7: A new observation from ac-susceptibility

Abstract

The magnetization (both dc and ac) of pyrochlore Eu2Ti2O7 have been investigated. Ac susceptibility measurements reveal a new unusual spin freezing below 35K for pure Eu2Ti2O7. Frequency dependence of these ac peak positions indicate slow spin relaxation near this temperature and it follows the Arrhenius formula suggesting a thermally activated relaxation process. The origin of this spin freezing has been attributed essentially to a single ion process which is associated to Eu3+ spin relaxation. Non-magnetic dilution by Y3+ ions also confirms the single ion freezing.

15 pages, 6 figures

References in corpus (4)

• Low Temperature Spin Freezing in Dy2Ti2O7 Spin Ice
• Definitive Evidence for Order-by-Quantum-Disorder in Er2Ti2O7
• Quantum and thermal spin relaxation in diluted spin ice: Dy(2-x)MxTi2O7 (M = Lu, Y)
• Low temperature dynamic freezing and the fragility of ordering in Tb2Sn2O7

Cited by in corpus (4)

• Structure and magnetic studies of geometrically frustrated disordered pyrochlores A${}_2$Zr${}_2$O${}_7$: (A = Eu, Gd, Er)
• Emergence of weak pyrochlore phase and signature of field induced spin ice ground state in Dy${}_{2-x}$La${}_x$Zr${}_2$O${}_7$; x = 0, 0.15, 0.3
• Electronic structure by X-ray absorption spectroscopy and observation offield induced unusually slowspin relaxation from magnetic properties in pyrochlore Eu${}_{2-x}$Fe${}_x$Ti${}_2$O${}_7$
• Traversing the pyrochlore stability diagram; microwave-assisted synthesis and discovery of mixed B-site Ln${}_2$InSbO${}_7$ family