Magnetic study of nanocrystalline Mg-doped lithium ferrite

Marek Pȩkała; Frank J. Berry; Hisham M. Widatallah

doi:10.1007/s10582-002-0023-2

Magnetic study of nanocrystalline Mg-doped lithium ferrite

Marek Pȩkała^*, Frank J. Berry, Hisham M. Widatallah

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Nanocrystalline magnesium doped ferrites with grain sizes between 50 and 11 nm were prepared by the ball milling. Magnetization of the non-milled ferrite diminishes monotonically with temperature and vanishes above the relatively high Curie temperature T_C of 900 K. A milling process suppresses T_C down to 830 K, which reveals the exchange interaction diminishing with the reduced grain sizes. The room temperature magnetic moment per formula unit diminishes from 2.15 μ_B for non-milled ferrite to 1.27 μ_B for 11 nm sample. The hyperfine magnetic fields derived from Mössbauer spectra are remarkably suppressed when the grain sizes are reduced below 20 nm.

Original language	English
Pages (from-to)	A101-A104
Journal	Czechoslovak Journal of Physics
Volume	52
Issue number	SUPPL.A
DOIs	https://doi.org/10.1007/s10582-002-0023-2
Publication status	Published - 2002
Externally published	Yes

Keywords

Magnetization
Mössbauer spectroscopy
Nanocrystalline ferrites

ASJC Scopus subject areas

General Physics and Astronomy

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10.1007/s10582-002-0023-2

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title = "Magnetic study of nanocrystalline Mg-doped lithium ferrite",

abstract = "Nanocrystalline magnesium doped ferrites with grain sizes between 50 and 11 nm were prepared by the ball milling. Magnetization of the non-milled ferrite diminishes monotonically with temperature and vanishes above the relatively high Curie temperature TC of 900 K. A milling process suppresses TC down to 830 K, which reveals the exchange interaction diminishing with the reduced grain sizes. The room temperature magnetic moment per formula unit diminishes from 2.15 μB for non-milled ferrite to 1.27 μB for 11 nm sample. The hyperfine magnetic fields derived from M{\"o}ssbauer spectra are remarkably suppressed when the grain sizes are reduced below 20 nm.",

keywords = "Magnetization, M{\"o}ssbauer spectroscopy, Nanocrystalline ferrites",

author = "Marek Pȩka{\l}a and Berry, {Frank J.} and Widatallah, {Hisham M.}",

year = "2002",

doi = "10.1007/s10582-002-0023-2",

language = "English",

volume = "52",

pages = "A101--A104",

journal = "Czechoslovak Journal of Physics",

issn = "0011-4626",

publisher = "Springer Netherlands",

number = "SUPPL.A",

}

TY - JOUR

T1 - Magnetic study of nanocrystalline Mg-doped lithium ferrite

AU - Pȩkała, Marek

AU - Berry, Frank J.

AU - Widatallah, Hisham M.

PY - 2002

Y1 - 2002

N2 - Nanocrystalline magnesium doped ferrites with grain sizes between 50 and 11 nm were prepared by the ball milling. Magnetization of the non-milled ferrite diminishes monotonically with temperature and vanishes above the relatively high Curie temperature TC of 900 K. A milling process suppresses TC down to 830 K, which reveals the exchange interaction diminishing with the reduced grain sizes. The room temperature magnetic moment per formula unit diminishes from 2.15 μB for non-milled ferrite to 1.27 μB for 11 nm sample. The hyperfine magnetic fields derived from Mössbauer spectra are remarkably suppressed when the grain sizes are reduced below 20 nm.

AB - Nanocrystalline magnesium doped ferrites with grain sizes between 50 and 11 nm were prepared by the ball milling. Magnetization of the non-milled ferrite diminishes monotonically with temperature and vanishes above the relatively high Curie temperature TC of 900 K. A milling process suppresses TC down to 830 K, which reveals the exchange interaction diminishing with the reduced grain sizes. The room temperature magnetic moment per formula unit diminishes from 2.15 μB for non-milled ferrite to 1.27 μB for 11 nm sample. The hyperfine magnetic fields derived from Mössbauer spectra are remarkably suppressed when the grain sizes are reduced below 20 nm.

KW - Magnetization

KW - Mössbauer spectroscopy

KW - Nanocrystalline ferrites

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U2 - 10.1007/s10582-002-0023-2

DO - 10.1007/s10582-002-0023-2

M3 - Article

AN - SCOPUS:0036948710

SN - 0011-4626

VL - 52

SP - A101-A104

JO - Czechoslovak Journal of Physics

JF - Czechoslovak Journal of Physics

IS - SUPPL.A

ER -

Magnetic study of nanocrystalline Mg-doped lithium ferrite

Abstract

Keywords

ASJC Scopus subject areas

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