Dirty Spin Ice: The Effect of Dilution on Spin Freezing in Dy2Ti2O7

Abstract

We have studied spin freezing in the diluted spin ice compound Dy2-xYxTi2O7 where the non-magnetic Y ions replace the magnetic Dy ions on the frustrated pyrochlore lattice. Magnetic a.c. and d.c. susceptibility data are presented with an analysis of relaxation times for dilutions of x = 0, 0.1, 0.2, and 0.4. Site dilution apparently decreases the relative number of spins participating in the ice-like freezing near 16 K while leaving the freezing temperature unchanged. Correspondingly the distribution of relaxation times associated with the freezing is broadened only slightly with increasing dilution, suggesting that the freezing process observed near T = 16 K involves local correlations among the spins.

15 pages, 6 figures, submitted to Physical Review B

References in corpus (6)

• Spin Ice State in Frustrated Magnetic Pyrochlore Materials
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• Magnetic anisotropy of the spin ice compound Dy2Ti2O7
• Susceptibility and dilution effects of the kagome bi-layer geometrically frustrated network. A Ga-NMR study of SrCr_(9p)Ga_(12-9p)O_(19)
• Short-range Magnetic interactions in the Spin-Ice compound Ho${}_2$Ti${}_2$O${}_7$
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• Quantum-Classical Reentrant Relaxation Crossover in Dy2Ti2O7 Spin-Ice
• Neutron Scattering Investigation of the Spin Ice State in Dy2Ti2O7
• Quantum and thermal spin relaxation in diluted spin ice: Dy(2-x)MxTi2O7 (M = Lu, Y)
• Structural Disorder and Properties of the Stuffed Pyrochlore Ho2TiO5
• Magnetocaloric Study of Spin Relaxation in `Frozen' Dipolar Spin Ice Dy2Ti2O7
• Investigations of the effect of nonmagnetic Ca substitution for magnetic Dy on spin-freezing in Dy2Ti2O7
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• High temperature spin-freezing transition in Pyrochlore Eu2Ti2O7: A new observation from ac-susceptibility
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• Strong quantum fluctuations due to competition between magnetic phases in a pyrochlore iridate
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• 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
• Competition between spin-glass and antiferromagnetic states in Tsai-type 1/1 and 2/1 quasicrystal approximants
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• Quantum Spin Relaxation with THz Attempt Frequency in the 1/3-Fire, 2/3-Ice Ferrimagnet SmMn${}_2$Ge${}_2$
• Flux roughening in spin ice with mixed $\pm J$ interactions