Doping dependence of spin-lattice coupling and two-dimensional ordering in multiferroic hexagonal Y1-xLuxMnO3 (0≤x≤ 1)

被引：72

作者：

Park, Junghwan ^{[1
,2
,3
]}

Lee, Seongsu ^{[2
]}

Kang, Misun ^{[2
]}

Jang, Kwang-Hyun ^{[2
]}

Lee, Changhee ^{[4
]}

Streltsov, S. V. ^{[5
,6
]}

Mazurenko, V. V. ^{[6
]}

Valentyuk, M. V. ^{[6
]}

Medvedeva, J. E. ^{[7
]}

Kamiyama, T. ^{[8
]}

Park, J. -G. ^{[1
,2
,3
,9
]}

机构：

[1] Seoul Natl Univ, Ctr Strongly Correlated Mat Res, Seoul 151742, South Korea

[2] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[4] Korea Atom Energy Res Inst, Div Neutron Sci, Taejon 305600, South Korea

[5] Inst Met Phys, Ekaterinburg 620041, Russia

[6] Ural State Tech Univ, Ekaterinburg 620002, Russia

[7] Missouri Univ Sci & Technol, Rolla, MO 65409 USA

[8] KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[9] Seoul Natl Univ, Dept Phys & Astron, Seoul 151742, South Korea

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 05期

基金：

新加坡国家研究基金会; 俄罗斯基础研究基金会;

关键词：

NEUTRON POWDER DIFFRACTION; ELECTRONIC-STRUCTURE; CRYSTAL; ANTIFERROMAGNET; YMNO3;

D O I：

10.1103/PhysRevB.82.054428

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have examined a complete phase diagram of Y1-xLuxMnO3 with 0 <= x <= 1 by using bulk measurements and neutron-diffraction studies. With increasing Lu concentration, Curie-Weiss temperature and Neel temperature are found to increase continuously while the two-dimensional nature of short-range magnetic correlation persists even in the paramagnetic phase throughout the entire doping range. At the same time, the lattice constants and the unit-cell volume get contracted with Lu doping, i.e., chemical pressure effect. This decrease in the lattice constants and the unit-cell volume then leads naturally to an increased magnetic exchange interaction as found in our local spin-density approximation band calculations. We also discover that there is strong correlation in the temperature dependence of a volume anomaly at T-N and the magnetic moments.

引用

页数：9

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