Element-selective local structural analysis around B-site cations in multiferroic Pb(Fe1/2Nb1/2)O3 using x-ray fluorescence holography

被引:10
作者
Kimura, K. [1 ]
Urushihara, D. [2 ]
Kondo, R. [1 ]
Yamamoto, Y. [1 ]
Ang, A. K. R. [1 ]
Asaka, T. [2 ,3 ]
Happo, N. [4 ]
Hagihara, T. [1 ]
Matsushita, T. [5 ]
Tajiri, H. [6 ]
Miyazaki, H. [1 ]
Ohara, K. [6 ]
Iwata, M. [1 ]
Hayashi, K. [1 ,3 ]
机构
[1] Nagoya Inst Technol, Dept Phys Sci & Engn, Nagoya, Aichi 4668555, Japan
[2] Nagoya Inst Technol, Div Adv Ceram, Nagoya, Aichi 4668555, Japan
[3] Nagoya Inst Technol, Frontier Res Inst Mat Sci, Nagoya, Aichi 4668555, Japan
[4] Hiroshima City Univ, Dept Comp & Network Engn, Hiroshima 7313194, Japan
[5] Nara Inst Sci & Technol, Grad Sch Sci & Technol, Ikoma, Nara 6300192, Japan
[6] Japan Synchrotron Radiat Res Inst JASRI, SPring 8, 1-1-1 Kouto, Sayo, Hyogo 6795198, Japan
关键词
ATOMIC-STRUCTURE; CRYSTAL; DIFFRACTION; ALLOY;
D O I
10.1103/PhysRevB.104.144101
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
X-ray fluorescence holography (XFH) measurements were carried out for multiferroic Pb(Fe1/2Nb1/2)O-3 (PFN) single crystal to investigate variations in the local structures around Nb ions with decreasing temperature from 300 to 100 K, in combination with single-crystal x-ray diffraction (XRD) experiments. We find that the Nb-Pb correlation is more significantly changed by cooling than the average structure derived from the single-crystal XRD experiments, indicating a mobile feature of Nb ions. Also, we analyze previously obtained XFH results around Fe ions in detail for comparison with those around Nb ions. In contrast to the case of Nb ions, the variation in the Fe-Pb correlation with decreasing temperature is well explained by the average structure from 300 K down to the Neel temperature of about 150 K. On the other hand, a remarkable positional fluctuation between Fe and Pb ions is observed at 100 K, which is evaluated to be 90% larger than that between Nb and Pb ions. This observation strongly indicates the presence of spin-lattice coupling in PFN. The present study clearly elucidates the differences of local environment around the Nb ions from that around the Fe ions located at the same B-site.
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页数:10
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