Ferroelectricity and competing interactions in Ho-deficient non-stoichiometric orthorhombic HoMnO3

被引：0

作者：

Wang, J. X.

Yan, Z. B.

Xie, Y. L.

Zhou, X. H.

Liu, J. -M. ^{[1
]}

机构：

[1] Nanjing Univ, Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 17期

关键词：

POLARIZATION;

D O I：

10.1063/1.4906529

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate the consequences of the Ho-deficient non-stoichiometry in orthorhombic HoMnO3 in terms of microscopic mechanisms for ferroelectricity modulation. It is suggested that the Ho-deficiency (then Mn excess) results in Ho-vacancies and then Mn occupation of the Ho-site with increasing non-stoichiometry. The Ho-deficiency enhances the Mn-Mn symmetric exchange striction by suppressing the independent Ho-Ho interaction, and thus benefits to the induced Ho spin ordering against the independent Ho spin ordering. The symmetric Ho-Mn exchange striction is thus enhanced by this induced Ho spin ordering, leading to remarkably enhanced ferroelectric polarization as observed. This work presents an alternative scheme to modulate the multiferroicity in rare-earth manganites of strong 4f-3d coupling. (C) 2015 AIP Publishing LLC.

引用

页数：4

共 4 条

[1] Mechanism of exchange striction of ferroelectricity in multiferroic orthorhombic HoMnO3 single crystals
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Choi, Y. J.
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Cheong, S. -W.
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[2] Asymmetric Ho 5d-O 2p hybridization as the origin of hexagonal ferroelectricity in multiferroic HoMnO3
Oak, Min-Ae
Lee, Jung-Hoon
Jang, Hyun Myung
[J]. PHYSICAL REVIEW B, 2011, 84 (15)
[3] Resistive investigation of pseudogap state in non-stoichiometric ReBa2Cu3O7-δ (Re = Y, Ho) single crystals with account for BCS-BEC crossover
Vovk, R.V.
Obolenskii, M.A.
Zavgorodniy, A.A.
Goulatis, I.L.
Chroneos, A.
Biletskiy, E.V.
[J]. Journal of Alloys and Compounds, 2009, 485 (1-2):
[4] Resistive investigation of pseudogap state in non-stoichiometric ReBa2Cu3O7-δ (Re = Y, Ho) single crystals with account for BCS-BEC crossover
Vovk, R. V.
Obolenskii, M. A.
Zavgorodniy, A. A.
Goulatis, I. L.
Chroneos, A.
Biletskiy, E. V.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 485 (1-2) : L21 - L23

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