Magnetic Properties of Green Cr 2O 3 Nanoparticles

G. H. Lee; B. J. Choi; S. H. Kim; J. W. Park; S. H. Huh; Y. Chang; Bongsoo Kim; J. Park; S. J. Oh

Magnetic Properties of Green Cr ₂O ₃ Nanoparticles

G. H. Lee, B. J. Choi, S. H. Kim, J. W. Park, S. H. Huh, Y. Chang, Bongsoo Kim, J. Park, S. J. Oh

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

8 Scopus citations

Abstract

We produced Cr ₂O ₃ nanoparticles with particle diameters of 30 - 100 nm by oxidizing CrO nanoparticles in air at 500 °C for 2 - 3 hours. The Cr ₂O ₃ nanoparticles had been produced by thermally decomposing Cr(CO) ₆ vapor. The structure of the Cr ₂O ₃ nanoparticles was determined to be rhombohedral with lattice constants of a = 4.962 and c = 13.590 Å, similar to the values of the bulk. We observed a phase transition at 42 K and a coercivity as high as 708 Oe at 5 K, although the bulk is antiferromagnetic. We suggest that the ferrimagnetic property of Cr ₂O ₃ nanoparticles below 42 K originates from the surface effects of Cr ₂O ₃ nanoparticles.

Original language	English
Pages (from-to)	L955-L957
Journal	Journal of the Korean Physical Society
Volume	43
Issue number	6
State	Published - Dec 2003

Keywords

Cr O nanoparticles
Ferrimagnetic property
Magnetic properties
Surface effects

Cite this

@article{e75865ff9df24c468b80697f286ae8ca,

title = "Magnetic Properties of Green Cr 2O 3 Nanoparticles",

abstract = "We produced Cr 2O 3 nanoparticles with particle diameters of 30 - 100 nm by oxidizing CrO nanoparticles in air at 500 °C for 2 - 3 hours. The Cr 2O 3 nanoparticles had been produced by thermally decomposing Cr(CO) 6 vapor. The structure of the Cr 2O 3 nanoparticles was determined to be rhombohedral with lattice constants of a = 4.962 and c = 13.590 {\AA}, similar to the values of the bulk. We observed a phase transition at 42 K and a coercivity as high as 708 Oe at 5 K, although the bulk is antiferromagnetic. We suggest that the ferrimagnetic property of Cr 2O 3 nanoparticles below 42 K originates from the surface effects of Cr 2O 3 nanoparticles.",

keywords = "Cr O nanoparticles, Ferrimagnetic property, Magnetic properties, Surface effects",

author = "Lee, {G. H.} and Choi, {B. J.} and Kim, {S. H.} and Park, {J. W.} and Huh, {S. H.} and Y. Chang and Bongsoo Kim and J. Park and Oh, {S. J.}",

year = "2003",

month = dec,

language = "English",

volume = "43",

pages = "L955--L957",

journal = "Journal of the Korean Physical Society",

issn = "0374-4884",

publisher = "Korean Physical Society",

number = "6",

}

TY - JOUR

T1 - Magnetic Properties of Green Cr 2O 3 Nanoparticles

AU - Lee, G. H.

AU - Choi, B. J.

AU - Kim, S. H.

AU - Park, J. W.

AU - Huh, S. H.

AU - Chang, Y.

AU - Kim, Bongsoo

AU - Park, J.

AU - Oh, S. J.

PY - 2003/12

Y1 - 2003/12

N2 - We produced Cr 2O 3 nanoparticles with particle diameters of 30 - 100 nm by oxidizing CrO nanoparticles in air at 500 °C for 2 - 3 hours. The Cr 2O 3 nanoparticles had been produced by thermally decomposing Cr(CO) 6 vapor. The structure of the Cr 2O 3 nanoparticles was determined to be rhombohedral with lattice constants of a = 4.962 and c = 13.590 Å, similar to the values of the bulk. We observed a phase transition at 42 K and a coercivity as high as 708 Oe at 5 K, although the bulk is antiferromagnetic. We suggest that the ferrimagnetic property of Cr 2O 3 nanoparticles below 42 K originates from the surface effects of Cr 2O 3 nanoparticles.

AB - We produced Cr 2O 3 nanoparticles with particle diameters of 30 - 100 nm by oxidizing CrO nanoparticles in air at 500 °C for 2 - 3 hours. The Cr 2O 3 nanoparticles had been produced by thermally decomposing Cr(CO) 6 vapor. The structure of the Cr 2O 3 nanoparticles was determined to be rhombohedral with lattice constants of a = 4.962 and c = 13.590 Å, similar to the values of the bulk. We observed a phase transition at 42 K and a coercivity as high as 708 Oe at 5 K, although the bulk is antiferromagnetic. We suggest that the ferrimagnetic property of Cr 2O 3 nanoparticles below 42 K originates from the surface effects of Cr 2O 3 nanoparticles.

KW - Cr O nanoparticles

KW - Ferrimagnetic property

KW - Magnetic properties

KW - Surface effects

UR - http://www.scopus.com/inward/record.url?scp=0345760147&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0345760147

SN - 0374-4884

VL - 43

SP - L955-L957

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 6

ER -

Magnetic Properties of Green Cr ₂O ₃ Nanoparticles

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Keywords

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