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Oh, Yoon Seok
Laboratory for Strong Correlation in Quantum Materials
Research Interests
  • Multiferroic
  • Ferroelectric
  • Quantum Magnetism

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Intrinsic ferroelectric polarization of orthorhombic manganites with E-type spin order

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Title
Intrinsic ferroelectric polarization of orthorhombic manganites with E-type spin order
Author
Chai, YSOh, Yoon SeokWang, LJManivannan, NFeng, SMYang, YSYan, LQJin, CQKim, Kee Hoon
Keywords
MULTIFERROICS
Issue Date
2012-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.85, no.18, pp.184406 -
Abstract
By directly measuring electrical hysteresis loops using the Positive-Up Negative-Down (PUND) method, we determined accurately the remanent ferroelectric polarization P r of orthorhombic RMnO 3 (R = Ho, Tm, Yb, and Lu) compounds below their E-type spin ordering temperatures. We found that LuMnO 3 has the largest P r of 0.17 μC/cm2 at 6 K in the series, the value of which allows us to predict that its single-crystal form can produce a P r of at least 0.6 μC/cm2 at 0 K. Furthermore, at a fixed temperature, P r decreases systematically with increasing rare earth ion radius from R = Lu to Ho, exhibiting a strong correlation with the variation of the in-plane Mn-O-Mn bond angle and Mn-O distances. Our experimental results suggest that the contribution of the Mn t 2g orbitals may dominate the ferroelectric polarization. © 2012 American Physical Society.
URI
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DOI
10.1103/PhysRevB.85.184406
ISSN
2469-9950
Appears in Collections:
PHY_Journal Papers
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