Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7
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...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2015-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/12/123018 |
| _version_ | 1797751058635685888 |
|---|---|
| author | L Lin Y L Xie J-J Wen S Dong Z B Yan J-M Liu |
| author_facet | L Lin Y L Xie J-J Wen S Dong Z B Yan J-M Liu |
| author_sort | L Lin |
| collection | DOAJ |
| description | 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 Dy _2 Ti _2 O _7 by probing the ferroelectricity, spin dynamics, and dielectric behaviors. Two ferroelectric transitions at T _c _1 = 25 K and T _c _2 = 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 results can be used for more investigations to explore multiferroicity in these spin-ice systems and other frustrated magnets. |
| first_indexed | 2024-03-12T16:42:57Z |
| format | Article |
| id | doaj.art-d74d9de66c8a45ebb1a1b1014806cd87 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:57Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-d74d9de66c8a45ebb1a1b1014806cd872023-08-08T14:24:24ZengIOP PublishingNew Journal of Physics1367-26302015-01-01171212301810.1088/1367-2630/17/12/123018Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7L Lin0Y L Xie1J-J Wen2S Dong3Z B Yan4J-M Liu5Department of Physics & Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University , Nanjing 211189, People’s Republic of China; Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaLaboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaInstitute for Quantum Matter and Department of Physics and Astronomy, The Johns Hopkins University , Baltimore, Maryland 21218, USADepartment of Physics & Jiangsu Key Laboratory for Advanced Metallic Materials, Southeast University , Nanjing 211189, People’s Republic of ChinaLaboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaLaboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, People’s Republic of ChinaThe 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 Dy _2 Ti _2 O _7 by probing the ferroelectricity, spin dynamics, and dielectric behaviors. Two ferroelectric transitions at T _c _1 = 25 K and T _c _2 = 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 results can be used for more investigations to explore multiferroicity in these spin-ice systems and other frustrated magnets.https://doi.org/10.1088/1367-2630/17/12/123018multiferroicsspin dynamicsmagnetic monopolespin ice |
| spellingShingle | L Lin Y L Xie J-J Wen S Dong Z B Yan J-M Liu Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 New Journal of Physics multiferroics spin dynamics magnetic monopole spin ice |
| title | Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 |
| title_full | Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 |
| title_fullStr | Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 |
| title_full_unstemmed | Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 |
| title_short | Experimental observation of magnetoelectricity in spin ice Dy2Ti2O7 |
| title_sort | experimental observation of magnetoelectricity in spin ice dy2ti2o7 |
| topic | multiferroics spin dynamics magnetic monopole spin ice |
| url | https://doi.org/10.1088/1367-2630/17/12/123018 |
| work_keys_str_mv | AT llin experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 AT ylxie experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 AT jjwen experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 AT sdong experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 AT zbyan experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 AT jmliu experimentalobservationofmagnetoelectricityinspinicedy2ti2o7 |