A study of the magnetic properties of nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles

Hua Yang; Zichen Wang; Muyu Zhao; Jianping Wang; Dehua Han; Helie Luo; Li Wang

doi:10.1016/S0254-0584(97)80078-8

A study of the magnetic properties of nanocrystalline LiFe₅O₈ and Li_0.5Fe_2.3Cr_0.2O₄ particles

Hua Yang, Zichen Wang, Muyu Zhao, Jianping Wang, Dehua Han, Helie Luo, Li Wang

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

22 Scopus citations

Abstract

Nanocrystalline LiFe₅O₈ and Li_0.5Fe_2.3Cr_0.2O₄ particles ranging from several nm to several hundred nm in size have been prepared by the poly(ethylene glycol) gel method. Their structure and magnetic properties were examined. It was found that the specific saturation magnetization σ_s of these particles decrease with decreasing particle size. The Curie temperature of LiFe₅O₈ particle 8.1 nm in diameter decreases to 590°C and is 50°C lower than that of the bulk. From the specific magnetization σ versus temperature T curve of nanocrystalline LiFe₅O₈ particle (9.1 nm in diameter), it seems that this sample consists of two magnetic phases. These phenomena are discussed in terms of superparamagnetism and surface magnetism.

Original language	English (US)
Pages (from-to)	60-63
Number of pages	4
Journal	Materials Chemistry and Physics
Volume	48
Issue number	1
DOIs	https://doi.org/10.1016/S0254-0584(97)80078-8
State	Published - Mar 15 1997
Externally published	Yes

Keywords

Lithium ferrite
Magnetic properties
Nanocrystallite

Publisher link

10.1016/S0254-0584(97)80078-8

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title = "A study of the magnetic properties of nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles",

abstract = "Nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles ranging from several nm to several hundred nm in size have been prepared by the poly(ethylene glycol) gel method. Their structure and magnetic properties were examined. It was found that the specific saturation magnetization σs of these particles decrease with decreasing particle size. The Curie temperature of LiFe5O8 particle 8.1 nm in diameter decreases to 590°C and is 50°C lower than that of the bulk. From the specific magnetization σ versus temperature T curve of nanocrystalline LiFe5O8 particle (9.1 nm in diameter), it seems that this sample consists of two magnetic phases. These phenomena are discussed in terms of superparamagnetism and surface magnetism.",

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author = "Hua Yang and Zichen Wang and Muyu Zhao and Jianping Wang and Dehua Han and Helie Luo and Li Wang",

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T1 - A study of the magnetic properties of nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles

AU - Yang, Hua

AU - Wang, Zichen

AU - Zhao, Muyu

AU - Wang, Jianping

AU - Han, Dehua

AU - Luo, Helie

AU - Wang, Li

PY - 1997/3/15

Y1 - 1997/3/15

N2 - Nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles ranging from several nm to several hundred nm in size have been prepared by the poly(ethylene glycol) gel method. Their structure and magnetic properties were examined. It was found that the specific saturation magnetization σs of these particles decrease with decreasing particle size. The Curie temperature of LiFe5O8 particle 8.1 nm in diameter decreases to 590°C and is 50°C lower than that of the bulk. From the specific magnetization σ versus temperature T curve of nanocrystalline LiFe5O8 particle (9.1 nm in diameter), it seems that this sample consists of two magnetic phases. These phenomena are discussed in terms of superparamagnetism and surface magnetism.

AB - Nanocrystalline LiFe5O8 and Li0.5Fe2.3Cr0.2O4 particles ranging from several nm to several hundred nm in size have been prepared by the poly(ethylene glycol) gel method. Their structure and magnetic properties were examined. It was found that the specific saturation magnetization σs of these particles decrease with decreasing particle size. The Curie temperature of LiFe5O8 particle 8.1 nm in diameter decreases to 590°C and is 50°C lower than that of the bulk. From the specific magnetization σ versus temperature T curve of nanocrystalline LiFe5O8 particle (9.1 nm in diameter), it seems that this sample consists of two magnetic phases. These phenomena are discussed in terms of superparamagnetism and surface magnetism.

KW - Lithium ferrite

KW - Magnetic properties

KW - Nanocrystallite

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