Experimental observation of magnetoelectricity in spin ice Dy 2 Ti 2 O 7
Abstract
The intrinsic noncollinear spin patterns in rare-earth pyrochlore are physically interesting, due to their many emergent properties (e.g., spin-ice and monopole-type excitation). Recent works have suggested that the magnetic monopole excitation of spin-ice systems is magnetoelectric active, but this fact has rarely been confirmed via experiment. In this work, we performed a systematic experimental investigation on the magnetoelectricity of Dy2Ti2O7 by probing the ferroelectricity, spin dynamics, and dielectric behaviors. Two ferroelectric transitions at Tc1 = 25 K and Tc2 =13 K were observed. Remarkable magnetoelectric coupling was identified below the lower transition temperature, with significant suppression of the electric polarization on applied magnetic field. Our results show that the lower ferroelectric transition temperature coincides with the Ising-spin paramagnetic transition point, below which the quasi-particle-like monopoles are populated, which indicates implicit correlation between electric dipoles and spin moments. The possible magnetoelectric mechanisms are discussed. Our findings can be used for more investigations to explore multiferroicity in these spin-ice systems and other frustrated magnets.
- Authors:
- Publication Date:
- Research Org.:
- Johns Hopkins Univ., Baltimore, MD (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1238983
- Alternate Identifier(s):
- OSTI ID: 1238984; OSTI ID: 1240129
- Grant/Contract Number:
- FG02-08ER46544; 1402043B
- Resource Type:
- Published Article
- Journal Name:
- New Journal of Physics
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 12; Journal ID: ISSN 1367-2630
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 36 MATERIALS SCIENCE; multiferroics; spin dynamics; magnetic monopole; spin ice
Citation Formats
Lin, L., Xie, Y. L., Wen, J-J, Dong, S., Yan, Z. B., and Liu, J-M. Experimental observation of magnetoelectricity in spin ice Dy 2 Ti 2 O 7. United Kingdom: N. p., 2015.
Web. doi:10.1088/1367-2630/17/12/123018.
Lin, L., Xie, Y. L., Wen, J-J, Dong, S., Yan, Z. B., & Liu, J-M. Experimental observation of magnetoelectricity in spin ice Dy 2 Ti 2 O 7. United Kingdom. https://doi.org/10.1088/1367-2630/17/12/123018
Lin, L., Xie, Y. L., Wen, J-J, Dong, S., Yan, Z. B., and Liu, J-M. Tue .
"Experimental observation of magnetoelectricity in spin ice Dy 2 Ti 2 O 7". United Kingdom. https://doi.org/10.1088/1367-2630/17/12/123018.
@article{osti_1238983,
title = {Experimental observation of magnetoelectricity in spin ice Dy 2 Ti 2 O 7},
author = {Lin, L. and Xie, Y. L. and Wen, J-J and Dong, S. and Yan, Z. B. and Liu, J-M},
abstractNote = {The intrinsic noncollinear spin patterns in rare-earth pyrochlore are physically interesting, due to their many emergent properties (e.g., spin-ice and monopole-type excitation). Recent works have suggested that the magnetic monopole excitation of spin-ice systems is magnetoelectric active, but this fact has rarely been confirmed via experiment. In this work, we performed a systematic experimental investigation on the magnetoelectricity of Dy2Ti2O7 by probing the ferroelectricity, spin dynamics, and dielectric behaviors. Two ferroelectric transitions at Tc1 = 25 K and Tc2 =13 K were observed. Remarkable magnetoelectric coupling was identified below the lower transition temperature, with significant suppression of the electric polarization on applied magnetic field. Our results show that the lower ferroelectric transition temperature coincides with the Ising-spin paramagnetic transition point, below which the quasi-particle-like monopoles are populated, which indicates implicit correlation between electric dipoles and spin moments. The possible magnetoelectric mechanisms are discussed. Our findings can be used for more investigations to explore multiferroicity in these spin-ice systems and other frustrated magnets.},
doi = {10.1088/1367-2630/17/12/123018},
journal = {New Journal of Physics},
number = 12,
volume = 17,
place = {United Kingdom},
year = {Tue Dec 01 00:00:00 EST 2015},
month = {Tue Dec 01 00:00:00 EST 2015}
}
https://doi.org/10.1088/1367-2630/17/12/123018
Web of Science
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