X-ray induced lock-in transition of cycloidal magnetic order in a multiferroic perovskite manganite

被引：3
|
作者：
Yamasaki, Y. [1 ,2 ,3 ]
Nakao, H. [4 ,5 ]
Murakami, Y. [4 ,5 ]
Nakajima, T. [3 ]
Sampietro, A. Lafuente [3 ]
Ohsumi, H. [6 ]
Takata, M. [6 ]
Arima, T. [3 ,7 ]
Tokura, Y. [1 ,2 ,3 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan
[2] Univ Tokyo, Quantum Phase Elect Ctr, Tokyo 1138656, Japan
[3] RIKEN, Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan
[4] High Energy Accelerator Res Org, Inst Mat Struct Sci, Condensed Matter Res Ctr, Tsukuba, Ibaraki 3050801, Japan
[5] High Energy Accelerator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan
[6] RIKEN SPring 8 Ctr, Sayo, Hyogo 6795148, Japan
[7] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan
来源：
PHYSICAL REVIEW B | 2015年 / 91卷 / 10期
基金：
日本学术振兴会;
关键词：
FERROELECTRICITY; POLARIZATION; REVERSAL;
D O I：
10.1103/PhysRevB.91.100403
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the x-ray photoexcitation effects on cycloidal magnetic order in a multiferroic perovskite-type manganite Gd0.5Tb0.5MnO3. The material exhibits a competition between the P (electric polarization)parallel to a ferroelectric state with the commensurate (C) ab-plane cycloidal and the P parallel to c ferroelectric state with the incommensurate (IC) bc-plane cycloidal spin structure. The phase transition between these two phases can be induced by an application of a magnetic field. We found that the x-ray irradiation can induce the bidirectional and persistent phase transition between IC and C phases. The nonresonant x-ray magnetic diffraction revealed that both the initial and the x-ray induced phases have the bc-plane cycloidal magnetic structure, whereas the magnetic wave number varies between IC and C. The x-ray induced bc-plane cycloidal C phase is thus the hidden multiferroic phase in the Gd1-xTbxMnO3 system, which does not show up with the application of any static field.
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页数：5
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