On the origin of the two thermally driven relaxations in diluted spin ice Dy1.6Y0.4Ti2O7

We report quantitative analysis of the ac susceptibility of the diluted spin ice compound Dy1.6Y0.4Ti2O7, by fitting the frequency spectra of the two observed relaxation modes with a double Cole-Cole formula. Our results suggest that both modes are thermally activated, with the same intrinsic freque...

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Bibliographic Details
Published inJournal of physics. Condensed matter Vol. 25; no. 4
Main Authors Xing, Hui, Guo, Hanjie, Feng, Chunmu, Xu, Zhu-An, Zeng, Hao
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 30.01.2013
Institute of Physics
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Physics
Saturation moments and magnetic susceptibilities
Spin cluster
Magnetic relaxation
Spin ice
Activation energy
Relaxation time
Dysprosium Yttrium Titanates Mixed
Magnetic susceptibility
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Summary:We report quantitative analysis of the ac susceptibility of the diluted spin ice compound Dy1.6Y0.4Ti2O7, by fitting the frequency spectra of the two observed relaxation modes with a double Cole-Cole formula. Our results suggest that both modes are thermally activated, with the same intrinsic frequency, but different activation barriers. We propose that these thermally activated relaxation modes can be attributed to correlated spin clusters.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/25/4/046005