Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe 2O 4 inverse spinel ferromagnetic films grown by pulsed laser deposition

Y. Y. Liao; Y. W. Li; Z. G. Hu; J. H. Chu

doi:10.1063/1.3683520

Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe ₂O ₄ inverse spinel ferromagnetic films grown by pulsed laser deposition

Y. Y. Liao, Y. W. Li, Z. G. Hu, J. H. Chu

School of Physics and Electronic Science

East China Normal University

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

50 Scopus citations

Abstract

Lattice vibrations of highly a-axis oriented CoFe ₂O ₄ (CFO) films have been investigated by Raman scattering in the temperature range of 80-873 K. The five phonon modes T _1g(2), T _1g(3), E _g, A _1g(1), A _1g(2), and their evolutions can be uniquely distinguished. It was found that an electron transfer between Co ² and Fe ³ cations occurs in octahedral sites at about 173 K. The structure disorder in the CFO films appears with increasing the temperature, which indicates the cation migration between tetrahedral and octahedral sites. The phenomena suggest the structural transformation trend from inverse spinel to normal spinel at the elevated temperatures.

Original language	English
Article number	071905
Journal	Applied Physics Letters
Volume	100
Issue number	7
DOIs	https://doi.org/10.1063/1.3683520
State	Published - 13 Feb 2012

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title = "Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe 2O 4 inverse spinel ferromagnetic films grown by pulsed laser deposition",

abstract = "Lattice vibrations of highly a-axis oriented CoFe 2O 4 (CFO) films have been investigated by Raman scattering in the temperature range of 80-873 K. The five phonon modes T 1g(2), T 1g(3), E g, A 1g(1), A 1g(2), and their evolutions can be uniquely distinguished. It was found that an electron transfer between Co 2 and Fe 3 cations occurs in octahedral sites at about 173 K. The structure disorder in the CFO films appears with increasing the temperature, which indicates the cation migration between tetrahedral and octahedral sites. The phenomena suggest the structural transformation trend from inverse spinel to normal spinel at the elevated temperatures.",

author = "Liao, \{Y. Y.\} and Li, \{Y. W.\} and Hu, \{Z. G.\} and Chu, \{J. H.\}",

year = "2012",

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T1 - Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe 2O 4 inverse spinel ferromagnetic films grown by pulsed laser deposition

AU - Liao, Y. Y.

AU - Li, Y. W.

AU - Hu, Z. G.

AU - Chu, J. H.

PY - 2012/2/13

Y1 - 2012/2/13

N2 - Lattice vibrations of highly a-axis oriented CoFe 2O 4 (CFO) films have been investigated by Raman scattering in the temperature range of 80-873 K. The five phonon modes T 1g(2), T 1g(3), E g, A 1g(1), A 1g(2), and their evolutions can be uniquely distinguished. It was found that an electron transfer between Co 2 and Fe 3 cations occurs in octahedral sites at about 173 K. The structure disorder in the CFO films appears with increasing the temperature, which indicates the cation migration between tetrahedral and octahedral sites. The phenomena suggest the structural transformation trend from inverse spinel to normal spinel at the elevated temperatures.

AB - Lattice vibrations of highly a-axis oriented CoFe 2O 4 (CFO) films have been investigated by Raman scattering in the temperature range of 80-873 K. The five phonon modes T 1g(2), T 1g(3), E g, A 1g(1), A 1g(2), and their evolutions can be uniquely distinguished. It was found that an electron transfer between Co 2 and Fe 3 cations occurs in octahedral sites at about 173 K. The structure disorder in the CFO films appears with increasing the temperature, which indicates the cation migration between tetrahedral and octahedral sites. The phenomena suggest the structural transformation trend from inverse spinel to normal spinel at the elevated temperatures.

UR - https://www.scopus.com/pages/publications/84863155894

U2 - 10.1063/1.3683520

DO - 10.1063/1.3683520

M3 - 文章

AN - SCOPUS:84863155894

SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 7

M1 - 071905

ER -

Temperature dependent phonon Raman scattering of highly a-axis oriented CoFe ₂O ₄ inverse spinel ferromagnetic films grown by pulsed laser deposition

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