Ca-induced phonon softening in BaTiO3 revealed by inelastic x-ray and neutron scattering

被引：0

作者：

Kimura, K. ^{[1
,2
,3
]}

Tsutsui, S. ^{[2
,4
]}

Yamamoto, Y. ^{[5
]}

Nakano, A. ^{[6
]}

Kawamura, K. ^{[1
]}

Kajimoto, R. ^{[7
]}

Kamazawa, K. ^{[8
]}

Martin, A. ^{[9
]}

Webber, K. G. ^{[10
]}

Kakimoto, K. ^{[9
]}

Hayashi, K. ^{[1
,2
]}

机构：

[1] Nagoya Inst Technol, Dept Phys Sci & Engn, Nagoya 4668555, Japan

[2] Japan Synchrotron Radiat Res Inst JASRI, SPring 8,1-1-1 Kouto, Sayo, Hyogo 6795198, Japan

[3] Natl Inst Mat Sci, Res Ctr Adv Measurement & Characterizat, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

[4] Ibaraki Univ, Inst Quantum Beam Sci, Grad Sch Sci & Engn, Hitachi, Ibaraki 3168511, Japan

[5] Nara Inst Sci & Technol NAIST, 8916-5 Takayama Cho, Ikoma, Nara 6300192, Japan

[6] Nagoya Univ, Dept Phys, Nagoya 4648602, Japan

[7] Japan Atom Energy Agcy JAEA, J PARC Ctr, Tokai, Ibaraki 3191195, Japan

[8] Comprehens Res Org Sci & Soc, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan

[9] Nagoya Inst Technol, Grad Sch Engn, Dept Life Sci & Appl Chem, Nagoya 4668555, Japan

[10] Friedrich Alexander Univ Erlangen Nurnberg FAU, Dept Mat Sci & Engn, Martensstr 516, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW B | 2024年 / 110卷 / 13期

关键词：

PHASE; MODES;

D O I：

10.1103/PhysRevB.110.134314

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We performed inelastic x-ray and neutron scattering (IXS and INS) experiments for (Ba, Ca)TiO3 single crystals to elucidate the effect of Ca doping on the atomic dynamics. Dispersion relations of transverse phonons in BaTiO3, (Ba0.9Ca0.1)TiO3, and (Ba0.8Ca0.2)TiO3 were determined. The A-site-O vibrational mode as well as the acoustic mode were observed both by IXS and INS, whereas the Ti-O soft mode was detected only by INS. It was found that the A-site-O vibration exhibits significant softening with increasing Ca concentration, while the Ti-O soft mode is almost unaffected by the Ca doping. This finding is discussed in comparison with the polarization hysteresis loops and piezoelectric coefficients of (Ba, Ca)TiO3. It is indicated that the softening of the A-site-O vibration contributes to the enhancement of the piezoelectricity of Ca-doped BaTiO3-based materials.

引用

页数：10

共 48 条

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