High-pressure synthesis, crystal structure and magnetic property of ilmenite-type FeGeO3

Daisuke Nakatsuka; Takashi Yoshino; Jun Kano; Hideki Hashimoto; Makoto Nakanishi; Jun Takada; Tatsuo Fujii

doi:10.1016/j.jssc.2012.11.020

High-pressure synthesis, crystal structure and magnetic property of ilmenite-type FeGeO₃

Daisuke Nakatsuka, Takashi Yoshino, Jun Kano, Hideki Hashimoto, Makoto Nakanishi, Jun Takada, Tatsuo Fujii

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We synthesized well-crystallized ilmenite-type FeGeO₃ to investigate its structural and magnetic properties. Ilmenite-type FeGeO ₃ were synthesized by high-pressure synthesis technique using a Kawai-type multi-anvil apparatus. Their structural and magnetic properties were examined by XRD analysis with Rietveld refinement, transmission electron microscopy, Mössbauer spectroscopy and SQUID-magnetization measurements. The subsequent annealing after the high-pressure synthesis was effective to improve the crystallinity of the ilmenite-type FeGeO₃. The primary particle size of ilmenite-type FeGeO₃ was ∼15 nm. Some particles seemed to be covered with non- or poorly crystalline phase even after the annealing, and others showed a lamellar microstructure parallel to the (0 0 1) plane. Theilmenite-type FeGeO₃ showed typical antiferromagnetic behavior with the Néel temperature of 79 K.

Original language	English
Pages (from-to)	520-524
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	198
DOIs	https://doi.org/10.1016/j.jssc.2012.11.020
Publication status	Published - Feb 2013

Keywords

Fe Mössbauer spectroscopy
High-pressure synthesis
Ilmenite-FeGeO
Rietveld refinement
SQUID magnetometry
Transmission electron microscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2012.11.020

Cite this

@article{c237bc17597a4854b2ba560a43ee8d05,

title = "High-pressure synthesis, crystal structure and magnetic property of ilmenite-type FeGeO3",

abstract = "We synthesized well-crystallized ilmenite-type FeGeO3 to investigate its structural and magnetic properties. Ilmenite-type FeGeO 3 were synthesized by high-pressure synthesis technique using a Kawai-type multi-anvil apparatus. Their structural and magnetic properties were examined by XRD analysis with Rietveld refinement, transmission electron microscopy, M{\"o}ssbauer spectroscopy and SQUID-magnetization measurements. The subsequent annealing after the high-pressure synthesis was effective to improve the crystallinity of the ilmenite-type FeGeO3. The primary particle size of ilmenite-type FeGeO3 was ∼15 nm. Some particles seemed to be covered with non- or poorly crystalline phase even after the annealing, and others showed a lamellar microstructure parallel to the (0 0 1) plane. Theilmenite-type FeGeO3 showed typical antiferromagnetic behavior with the N{\'e}el temperature of 79 K.",

keywords = "Fe M{\"o}ssbauer spectroscopy, High-pressure synthesis, Ilmenite-FeGeO, Rietveld refinement, SQUID magnetometry, Transmission electron microscopy",

author = "Daisuke Nakatsuka and Takashi Yoshino and Jun Kano and Hideki Hashimoto and Makoto Nakanishi and Jun Takada and Tatsuo Fujii",

note = "Funding Information: This study was financially supported by the Grant-in-Aid for Scientific Research (B)(No. 23350092, 2011, T.F. ).",

year = "2013",

month = feb,

doi = "10.1016/j.jssc.2012.11.020",

language = "English",

volume = "198",

pages = "520--524",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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T1 - High-pressure synthesis, crystal structure and magnetic property of ilmenite-type FeGeO3

AU - Nakatsuka, Daisuke

AU - Yoshino, Takashi

AU - Kano, Jun

AU - Hashimoto, Hideki

AU - Nakanishi, Makoto

AU - Takada, Jun

AU - Fujii, Tatsuo

N1 - Funding Information: This study was financially supported by the Grant-in-Aid for Scientific Research (B)(No. 23350092, 2011, T.F. ).

PY - 2013/2

Y1 - 2013/2

N2 - We synthesized well-crystallized ilmenite-type FeGeO3 to investigate its structural and magnetic properties. Ilmenite-type FeGeO 3 were synthesized by high-pressure synthesis technique using a Kawai-type multi-anvil apparatus. Their structural and magnetic properties were examined by XRD analysis with Rietveld refinement, transmission electron microscopy, Mössbauer spectroscopy and SQUID-magnetization measurements. The subsequent annealing after the high-pressure synthesis was effective to improve the crystallinity of the ilmenite-type FeGeO3. The primary particle size of ilmenite-type FeGeO3 was ∼15 nm. Some particles seemed to be covered with non- or poorly crystalline phase even after the annealing, and others showed a lamellar microstructure parallel to the (0 0 1) plane. Theilmenite-type FeGeO3 showed typical antiferromagnetic behavior with the Néel temperature of 79 K.

AB - We synthesized well-crystallized ilmenite-type FeGeO3 to investigate its structural and magnetic properties. Ilmenite-type FeGeO 3 were synthesized by high-pressure synthesis technique using a Kawai-type multi-anvil apparatus. Their structural and magnetic properties were examined by XRD analysis with Rietveld refinement, transmission electron microscopy, Mössbauer spectroscopy and SQUID-magnetization measurements. The subsequent annealing after the high-pressure synthesis was effective to improve the crystallinity of the ilmenite-type FeGeO3. The primary particle size of ilmenite-type FeGeO3 was ∼15 nm. Some particles seemed to be covered with non- or poorly crystalline phase even after the annealing, and others showed a lamellar microstructure parallel to the (0 0 1) plane. Theilmenite-type FeGeO3 showed typical antiferromagnetic behavior with the Néel temperature of 79 K.

KW - Fe Mössbauer spectroscopy

KW - High-pressure synthesis

KW - Ilmenite-FeGeO

KW - Rietveld refinement

KW - SQUID magnetometry

KW - Transmission electron microscopy

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