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Irreversible magnetic-field dependence of low-temperature heat transport of spin-ice compound Dy2Ti2O7 in a [111] field.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Apr2013, Vol. 87 Issue 14, p144404-1-144404-6. 6p. - Publication Year :
- 2013
-
Abstract
- We study the low-temperature thermal conductivity (κ) of Dy2Ti2O7 along and perpendicular to the (111) plane and under the magnetic field along the [111] direction. Besides the steplike decreases of κ at the field-induced transitions from the spin-ice state to the kagomé-ice state and then to the polarized state, an abnormal phenomenon is that the κ(H) isotherms show a clear irreversibility at very low temperatures upon sweeping the magnetic field up and down. This phenomenon surprisingly has no correspondence with the well-known magnetization hysteresis. Possible origins for this irreversibility are discussed; in particular, a pinning effect of magnetic monopoles in a spin-ice compound by the weak disorders is proposed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 87
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 87970860
- Full Text :
- https://doi.org/10.1103/PhysRevB.87.144404