Evolution of ferroelectric and antiferromagnetic phases of TbMn2O5 under high magnetic field up to 45 T
- Authors
- Haam, S. Y.; Kim, J. W.; Kim, T. H.; Kim, Kee Hoon; Park, S.; Hur, N.; Cheong, S. -W.; Harrison, N.; Migliori, A.
- Issue Date
- Jan-2006
- Publisher
- Gordon and Breach Science Publishers
- Keywords
- lead strontium titanate; elastic characterization; elastic-electric coupling
- Citation
- Ferroelectrics, v.336, no.1, pp 153 - 159
- Pages
- 7
- Journal Title
- Ferroelectrics
- Volume
- 336
- Number
- 1
- Start Page
- 153
- End Page
- 159
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/57392
- DOI
- 10.1080/00150190600696055
- ISSN
- 0015-0193
1563-5112
- Abstract
- We determine high magnetic field (B//a) vs temperature phase diagram of TbMn2O5 by measurements of dielectric constant (epsilon//b) and magnetization under static and pulsed B up to 45 T, and pyroelectric/magnetoelectric currents up to 9 T. Our results reveal that a ferroelectric (FE) transition temperature at T-C = 38 K at B = 0 T changes little under B up to 33 T, while incommensurate antiferromagnetic phase, characterized as increased e and negative polarization below 25 K at B = 0 T, becomes unstable above B = similar to 20 T at low temperatures. Furthermore, a positive FE polarization component, coined with a Tb f-spin ordering below similar to 15 K at B = 0 T, abruptly disappears with Tb f- spin reorientation under B = similar to 2 T. Determined phase diagram shows that both magnitude of FE polarization and e value are sensitively dependent on the evolution of magnetic order parameters of both Mn-d and Tb-f spins tuned by high magnetic fields.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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