Preparation and properties of CuCr2Se4 ferromagnetic spinel nanocrystals

D. Kim; A. N. Rusnak; S. Parameswaran; C. R. Patra; V. B. Trofimov; R. Harpness; A. Gedanken; Yy S. Tver'yanovich

doi:10.1134/S1087659606030138

Preparation and properties of CuCr₂Se₄ ferromagnetic spinel nanocrystals

D. Kim, A. N. Rusnak, S. Parameswaran, C. R. Patra, V. B. Trofimov, R. Harpness, A. Gedanken, Yy S. Tver'yanovich

Department of Chemistry

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

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Abstract

Polycrystalline and nanocrystalline samples of the CuCr₂Se ₄ ferromagnetic spinel are synthesized. The mean size of nanocrystals is 50 nm. The Curie temperature of spinel nanocrystals (465 K) is higher than that of spinel polycrystals (435 K). Laser irradiation at a wavelength of 1.5 μm (in an external magnetic field) increases the magnetization of the noncrystalline powder. Most likely, this can be explained by the change in the orientation of magnetic moments of single-domain nanoparticles. The observed effect reaches a maximum in magnetic fields with a strength lower than that of the saturation field.

Original language	English
Pages (from-to)	330-336
Number of pages	7
Journal	Glass Physics and Chemistry
Volume	32
Issue number	3
DOIs	https://doi.org/10.1134/S1087659606030138
State	Published - May 2006

Bibliographical note

Funding Information:
ACKNOWLEDGMENTS This work was supported by the Russian Foundation for Basic Research, project no. 04-03-33049.

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abstract = "Polycrystalline and nanocrystalline samples of the CuCr2Se 4 ferromagnetic spinel are synthesized. The mean size of nanocrystals is 50 nm. The Curie temperature of spinel nanocrystals (465 K) is higher than that of spinel polycrystals (435 K). Laser irradiation at a wavelength of 1.5 μm (in an external magnetic field) increases the magnetization of the noncrystalline powder. Most likely, this can be explained by the change in the orientation of magnetic moments of single-domain nanoparticles. The observed effect reaches a maximum in magnetic fields with a strength lower than that of the saturation field.",

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AU - Kim, D.

AU - Rusnak, A. N.

AU - Parameswaran, S.

AU - Patra, C. R.

AU - Trofimov, V. B.

AU - Harpness, R.

AU - Gedanken, A.

AU - Tver'yanovich, Yy S.

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AB - Polycrystalline and nanocrystalline samples of the CuCr2Se 4 ferromagnetic spinel are synthesized. The mean size of nanocrystals is 50 nm. The Curie temperature of spinel nanocrystals (465 K) is higher than that of spinel polycrystals (435 K). Laser irradiation at a wavelength of 1.5 μm (in an external magnetic field) increases the magnetization of the noncrystalline powder. Most likely, this can be explained by the change in the orientation of magnetic moments of single-domain nanoparticles. The observed effect reaches a maximum in magnetic fields with a strength lower than that of the saturation field.

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Preparation and properties of CuCr₂Se₄ ferromagnetic spinel nanocrystals

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