Magnetic Excitations in the Low-Temperature Ferroelectric Phase of Multiferroic YMn2O5 Using Inelastic Neutron Scattering

被引：25

作者：

Kim, J. -H. ^{[1
,2
]}

van der Vegte, M. A. ^{[3
]}

Scaramucci, A. ^{[3
]}

Artyukhin, S. ^{[3
]}

Chung, J. -H. ^{[4
]}

Park, S. ^{[5
,6
,7
]}

Cheong, S-W. ^{[5
,6
]}

Mostovoy, M. ^{[3
]}

Lee, S. -H. ^{[1
]}

机构：

[1] Univ Virginia, Dept Phys, Charlottesville, VA 22904 USA

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[3] Univ Groningen, Zernike Inst Adv Mat, Ag Groningen, Netherlands

[4] Korea Univ, Dept Phys, Seoul 136713, South Korea

[5] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

[6] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[7] Chung Ang Univ, Dept Phys, Seoul 156756, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 09期

基金：

美国国家科学基金会; 新加坡国家研究基金会;

关键词：

D O I：

10.1103/PhysRevLett.107.097401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We studied magnetic excitations in a low-temperature ferroelectric phase of the multiferroic YMn2O5 using inelastic neutron scattering (INS). We identify low-energy magnon modes and establish a correspondence between the magnon peaks observed by INS and electromagnon peaks observed in optical absorption [A. B. Sushkov et al., Phys. Rev. Lett. 98, 027202 (2007).]. Furthermore, we explain the microscopic mechanism, which results in the lowest-energy electromagnon peak, by comparing the inelastic neutron spectral weight with the polarization in the commensurate ferroelectric phase.

引用

页数：4

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