The crystal structure and magnetic properties of M-type (La·AM)O·nFe2O3 hexagonal ferrites (AM=Na, K, Rb)

Ryo Murakami; Kunihiro Shima; Hirofumi Kakuta; Hitoshi Takamura; Terumi Tanaka; Masuo Okada; Masakatsu Fukuda; Masanori Sano; Kimiyuki Kamino

doi:10.2320/matertrans1989.37.499

The crystal structure and magnetic properties of M-type (La·AM)O·nFe₂O₃ hexagonal ferrites (AM=Na, K, Rb)

Ryo Murakami, Kunihiro Shima, Hirofumi Kakuta, Hitoshi Takamura, Terumi Tanaka, Masuo Okada, Masakatsu Fukuda, Masanori Sano, Kimiyuki Kamino

ENG - Materials Science

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

6 Citations (Scopus)

Abstract

Appeared phases of the (La·AM)O·nFe₂O₃ ferrites (AM=Na, K, Rb) where n value varied between 4 to 6 were investigated. The almost single phase of La-AM ferrites with magnetoplumbite structure was prepared in nominal compositions of (La_0.5Na_0.5)0·4Fe₂O₃ and (La_0.7K_0.3)O·5Fe₂O₃. The crystal structure and magnetic properties of these ferrites were studied. The Rietveld profile analysis of XRD data indicates that the structural parameters of these ferrites are refined to weighted pattern R factor R_wp of about 6%. The magnetization of these ferrites is about 70-80 μWb·m·kg^-1 at room temperature at the applied field of 1200kA·m^-1, their Curie temperature is about 710-730K, and their anisotropy field is about 1100kA·m^-1.

Original language	English
Pages (from-to)	499-502
Number of pages	4
Journal	materials transactions, jim
Volume	37
Issue number	3
DOIs	https://doi.org/10.2320/matertrans1989.37.499
Publication status	Published - 1996

Keywords

Lanthanum
M-type ferrites
Potassium
Rietveld analysis, (LaNa)o·feo ,(Lak)o·fe o
Rubidium
Single phase
Sodium

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10.2320/matertrans1989.37.499

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title = "The crystal structure and magnetic properties of M-type (La·AM)O·nFe2O3 hexagonal ferrites (AM=Na, K, Rb)",

abstract = "Appeared phases of the (La·AM)O·nFe2O3 ferrites (AM=Na, K, Rb) where n value varied between 4 to 6 were investigated. The almost single phase of La-AM ferrites with magnetoplumbite structure was prepared in nominal compositions of (La0.5Na0.5)0·4Fe2O3 and (La0.7K0.3)O·5Fe2O3. The crystal structure and magnetic properties of these ferrites were studied. The Rietveld profile analysis of XRD data indicates that the structural parameters of these ferrites are refined to weighted pattern R factor Rwp of about 6%. The magnetization of these ferrites is about 70-80 μWb·m·kg-1 at room temperature at the applied field of 1200kA·m-1, their Curie temperature is about 710-730K, and their anisotropy field is about 1100kA·m-1.",

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author = "Ryo Murakami and Kunihiro Shima and Hirofumi Kakuta and Hitoshi Takamura and Terumi Tanaka and Masuo Okada and Masakatsu Fukuda and Masanori Sano and Kimiyuki Kamino",

year = "1996",

doi = "10.2320/matertrans1989.37.499",

language = "English",

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pages = "499--502",

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T1 - The crystal structure and magnetic properties of M-type (La·AM)O·nFe2O3 hexagonal ferrites (AM=Na, K, Rb)

AU - Murakami, Ryo

AU - Shima, Kunihiro

AU - Kakuta, Hirofumi

AU - Takamura, Hitoshi

AU - Tanaka, Terumi

AU - Okada, Masuo

AU - Fukuda, Masakatsu

AU - Sano, Masanori

AU - Kamino, Kimiyuki

PY - 1996

Y1 - 1996

N2 - Appeared phases of the (La·AM)O·nFe2O3 ferrites (AM=Na, K, Rb) where n value varied between 4 to 6 were investigated. The almost single phase of La-AM ferrites with magnetoplumbite structure was prepared in nominal compositions of (La0.5Na0.5)0·4Fe2O3 and (La0.7K0.3)O·5Fe2O3. The crystal structure and magnetic properties of these ferrites were studied. The Rietveld profile analysis of XRD data indicates that the structural parameters of these ferrites are refined to weighted pattern R factor Rwp of about 6%. The magnetization of these ferrites is about 70-80 μWb·m·kg-1 at room temperature at the applied field of 1200kA·m-1, their Curie temperature is about 710-730K, and their anisotropy field is about 1100kA·m-1.

AB - Appeared phases of the (La·AM)O·nFe2O3 ferrites (AM=Na, K, Rb) where n value varied between 4 to 6 were investigated. The almost single phase of La-AM ferrites with magnetoplumbite structure was prepared in nominal compositions of (La0.5Na0.5)0·4Fe2O3 and (La0.7K0.3)O·5Fe2O3. The crystal structure and magnetic properties of these ferrites were studied. The Rietveld profile analysis of XRD data indicates that the structural parameters of these ferrites are refined to weighted pattern R factor Rwp of about 6%. The magnetization of these ferrites is about 70-80 μWb·m·kg-1 at room temperature at the applied field of 1200kA·m-1, their Curie temperature is about 710-730K, and their anisotropy field is about 1100kA·m-1.

KW - Lanthanum

KW - M-type ferrites

KW - Potassium

KW - Rietveld analysis, (LaNa)o·feo ,(Lak)o·fe o

KW - Rubidium

KW - Single phase

KW - Sodium

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The crystal structure and magnetic properties of M-type (La·AM)O·nFe₂O₃ hexagonal ferrites (AM=Na, K, Rb)

Abstract

Keywords

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