Magnetic property and 57Fe Mössbauer analysis of dilute Fe and Nb codoped SrTiO3-δ(STO) perovskites

Kiyoshi Nomura; Shuhei Yamakawa; Miki Kasari; Yuya Koike; Akio Nakanishi; Shiro Kubuki; Atsushi Okazawa

doi:10.1007/s10751-019-1681-9

Magnetic property and ⁵⁷Fe Mössbauer analysis of dilute Fe and Nb codoped SrTiO_3-δ(STO) perovskites

Kiyoshi Nomura^*, Shuhei Yamakawa, Miki Kasari, Yuya Koike, Akio Nakanishi, Shiro Kubuki, Atsushi Okazawa

^*この研究の対応する著者

研究成果: Article › 査読

3 被引用数 (Scopus)

抄録

Dilute Fe and Nb codoped SrTiO_3-δ (STO) perovskites were prepared by a complex formation and thermal decomposition method. The structure, magnetization properties and chemical states of Fe and Nb codoped STO perovskites were characterized by XRD, VSM and Mössbauer spectrometry. Mössbauer spectra of ⁵⁷Fe and Nb codoped STO perovskites consist of paramagnetic doublet and magnetic relaxation components. The 1% Fe + 5% Nb codoped STO sample showed the smallest lattice constant and the largest ferromagnetism among 0.5–4% Fe + 5% Nb codoped STO perovskites. The most distortion of cubic STO lattice and the largest magnetic relaxation in Mössbauer spectrum were observed for the 0.5% Fe and 5% Nb codoped STO perovskite. It is considered that diluted magnetism in this system is related with the deformation of cubic structure due to defects.

本文言語	English
論文番号	15
ジャーナル	Hyperfine Interactions
巻	241
号	1
DOI	https://doi.org/10.1007/s10751-019-1681-9
出版ステータス	Published - 2019 12月 1
外部発表	はい

ASJC Scopus subject areas

原子分子物理学および光学
核物理学および高エネルギー物理学
凝縮系物理学
物理化学および理論化学

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10.1007/s10751-019-1681-9

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title = "Magnetic property and 57Fe M{\"o}ssbauer analysis of dilute Fe and Nb codoped SrTiO3-δ(STO) perovskites",

abstract = "Dilute Fe and Nb codoped SrTiO3-δ (STO) perovskites were prepared by a complex formation and thermal decomposition method. The structure, magnetization properties and chemical states of Fe and Nb codoped STO perovskites were characterized by XRD, VSM and M{\"o}ssbauer spectrometry. M{\"o}ssbauer spectra of 57Fe and Nb codoped STO perovskites consist of paramagnetic doublet and magnetic relaxation components. The 1% Fe + 5% Nb codoped STO sample showed the smallest lattice constant and the largest ferromagnetism among 0.5–4% Fe + 5% Nb codoped STO perovskites. The most distortion of cubic STO lattice and the largest magnetic relaxation in M{\"o}ssbauer spectrum were observed for the 0.5% Fe and 5% Nb codoped STO perovskite. It is considered that diluted magnetism in this system is related with the deformation of cubic structure due to defects.",

keywords = "Diluted magnetism, Fe and Nb doped SrTiO, M{\"o}ssbauer analysis, Perovskite oxide",

author = "Kiyoshi Nomura and Shuhei Yamakawa and Miki Kasari and Yuya Koike and Akio Nakanishi and Shiro Kubuki and Atsushi Okazawa",

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AU - Nomura, Kiyoshi

AU - Yamakawa, Shuhei

AU - Kasari, Miki

AU - Koike, Yuya

AU - Nakanishi, Akio

AU - Kubuki, Shiro

AU - Okazawa, Atsushi

PY - 2019/12/1

Y1 - 2019/12/1

N2 - Dilute Fe and Nb codoped SrTiO3-δ (STO) perovskites were prepared by a complex formation and thermal decomposition method. The structure, magnetization properties and chemical states of Fe and Nb codoped STO perovskites were characterized by XRD, VSM and Mössbauer spectrometry. Mössbauer spectra of 57Fe and Nb codoped STO perovskites consist of paramagnetic doublet and magnetic relaxation components. The 1% Fe + 5% Nb codoped STO sample showed the smallest lattice constant and the largest ferromagnetism among 0.5–4% Fe + 5% Nb codoped STO perovskites. The most distortion of cubic STO lattice and the largest magnetic relaxation in Mössbauer spectrum were observed for the 0.5% Fe and 5% Nb codoped STO perovskite. It is considered that diluted magnetism in this system is related with the deformation of cubic structure due to defects.

AB - Dilute Fe and Nb codoped SrTiO3-δ (STO) perovskites were prepared by a complex formation and thermal decomposition method. The structure, magnetization properties and chemical states of Fe and Nb codoped STO perovskites were characterized by XRD, VSM and Mössbauer spectrometry. Mössbauer spectra of 57Fe and Nb codoped STO perovskites consist of paramagnetic doublet and magnetic relaxation components. The 1% Fe + 5% Nb codoped STO sample showed the smallest lattice constant and the largest ferromagnetism among 0.5–4% Fe + 5% Nb codoped STO perovskites. The most distortion of cubic STO lattice and the largest magnetic relaxation in Mössbauer spectrum were observed for the 0.5% Fe and 5% Nb codoped STO perovskite. It is considered that diluted magnetism in this system is related with the deformation of cubic structure due to defects.

KW - Diluted magnetism

KW - Fe and Nb doped SrTiO

KW - Mössbauer analysis

KW - Perovskite oxide

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