Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family
The RMn2O5 manganite compounds represent one class of multiferroic family with magnetic origins, which has been receiving continuous attention in the past decade. So far, our understanding of the magnetic origins for ferroelectricity in RMn2O5 is associated with the nearly collinear antiferromagneti...
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| Format: | Article |
| Language: | English |
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World Scientific Publishing
2015-06-01
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| Series: | Journal of Advanced Dielectrics |
| Subjects: | |
| Online Access: | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15300030 |
| _version_ | 1819160569816547328 |
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| author | J.-M. Liu S. Dong |
| author_facet | J.-M. Liu S. Dong |
| author_sort | J.-M. Liu |
| collection | DOAJ |
| description | The RMn2O5 manganite compounds represent one class of multiferroic family with magnetic origins, which has been receiving continuous attention in the past decade. So far, our understanding of the magnetic origins for ferroelectricity in RMn2O5 is associated with the nearly collinear antiferromagnetic structure of Mn ions, while the exchange striction induced ionic displacements are the consequence of the spin frustration competitions. While this scenario may be applied to almost all RMn2O5 members, its limitation is either clear: the temperature-dependent behaviors of electric polarization and its responses to external stimuli are seriously materials dependent. These inconsistences raise substantial concern with the state-of-the-art physics of ferroelectricity in RMn2O5. In this mini-review, we present our recent experimental results on the roles of the 4f moments from R ions which are intimately coupled with the 3d moments from Mn ions. DyMn2O5 is a golden figure for illustrating these roles. It is demonstrated that the spin structure accommodates two nearly collinear sublattices which generate respectively two ferroelectric (FE) sublattices, enabling DyMn2O5 an emergent ferrielectric (FIE) system rarely identified in magnetically induced FEs. The evidence is presented from several aspects, including FIE-like phenomena and magnetoelectric responses, proposed structural model, and experimental check by nonmagnetic substitutions of the 3d and 4f moments. Additional perspectives regarding possible challenges in understanding the multiferroicity of RMn2O5 as a generalized scenario are discussed. |
| first_indexed | 2024-12-22T16:58:32Z |
| format | Article |
| id | doaj.art-2418e62ff7b94874a25120c7922cbac6 |
| institution | Directory Open Access Journal |
| issn | 2010-135X 2010-1368 |
| language | English |
| last_indexed | 2024-12-22T16:58:32Z |
| publishDate | 2015-06-01 |
| publisher | World Scientific Publishing |
| record_format | Article |
| series | Journal of Advanced Dielectrics |
| spelling | doaj.art-2418e62ff7b94874a25120c7922cbac62022-12-21T18:19:23ZengWorld Scientific PublishingJournal of Advanced Dielectrics2010-135X2010-13682015-06-01521530003-11530003-1810.1142/S2010135X1530003010.1142/S2010135X15300030Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 familyJ.-M. Liu0S. Dong1Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. ChinaDepartment of Physics, Southeast University, Nanjing 211189, P. R. ChinaThe RMn2O5 manganite compounds represent one class of multiferroic family with magnetic origins, which has been receiving continuous attention in the past decade. So far, our understanding of the magnetic origins for ferroelectricity in RMn2O5 is associated with the nearly collinear antiferromagnetic structure of Mn ions, while the exchange striction induced ionic displacements are the consequence of the spin frustration competitions. While this scenario may be applied to almost all RMn2O5 members, its limitation is either clear: the temperature-dependent behaviors of electric polarization and its responses to external stimuli are seriously materials dependent. These inconsistences raise substantial concern with the state-of-the-art physics of ferroelectricity in RMn2O5. In this mini-review, we present our recent experimental results on the roles of the 4f moments from R ions which are intimately coupled with the 3d moments from Mn ions. DyMn2O5 is a golden figure for illustrating these roles. It is demonstrated that the spin structure accommodates two nearly collinear sublattices which generate respectively two ferroelectric (FE) sublattices, enabling DyMn2O5 an emergent ferrielectric (FIE) system rarely identified in magnetically induced FEs. The evidence is presented from several aspects, including FIE-like phenomena and magnetoelectric responses, proposed structural model, and experimental check by nonmagnetic substitutions of the 3d and 4f moments. Additional perspectives regarding possible challenges in understanding the multiferroicity of RMn2O5 as a generalized scenario are discussed.http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15300030 RMn 2 O 5 multiferroicferrielectricity3d-4f couplingexchange striction |
| spellingShingle | J.-M. Liu S. Dong Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family Journal of Advanced Dielectrics RMn 2 O 5 multiferroic ferrielectricity 3d-4f coupling exchange striction |
| title | Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family |
| title_full | Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family |
| title_fullStr | Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family |
| title_full_unstemmed | Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family |
| title_short | Ferrielectricity in DyMn2O5: A golden touchstone for multiferroicity of RMn2O5 family |
| title_sort | ferrielectricity in dymn2o5 a golden touchstone for multiferroicity of rmn2o5 family |
| topic | RMn 2 O 5 multiferroic ferrielectricity 3d-4f coupling exchange striction |
| url | http://www.worldscientific.com/doi/pdf/10.1142/S2010135X15300030 |
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