Magneto-optical properties of ZnO:Co nanocrystalline films

Luc Huy Hoang; Nguyen The Khoi; Nguyen Hoang Hai; W. Pacuski; In Sang Yang

doi:10.3938/jkps.52.1621

Magneto-optical properties of ZnO:Co nanocrystalline films

Luc Huy Hoang, Nguyen The Khoi, Nguyen Hoang Hai, W. Pacuski, In Sang Yang

Department of Physics

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

6 Scopus citations

Abstract

Co doped ZnO films were synthesized from the precursors Zn(CH ₃COO)₂.2H₂O and Co(CH₃COO) ₂.4H₂O by using a "High Voltage Spray Pyrolysis" technique. The physical properties of the prepared films were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and physical property mesurement system (PPMS) measurements. The films studied were of a wurtzite phase with grain sizes of about 20 nm. The 5 % Co-doped ZnO films exhibited ferromagnetic behavior at room temperature. The transmission and the optical magnetic circular dichroism (MCD) measurements confirmed that Co ²⁺ was located at the tetrahedral sites of the ZnO wurtzite structure. MCD results showed that the observed ferromagnetism was less likely related to a carrier-induced mechanism.

Original language	English
Pages (from-to)	1621-1624
Number of pages	4
Journal	Journal of the Korean Physical Society
Volume	52
Issue number	5
DOIs	https://doi.org/10.3938/jkps.52.1621
State	Published - May 2008

Keywords

Diluted magnetic semiconductor
Ferromagnetism
Optical magnetic circular dichroism

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title = "Magneto-optical properties of ZnO:Co nanocrystalline films",

abstract = "Co doped ZnO films were synthesized from the precursors Zn(CH 3COO)2.2H2O and Co(CH3COO) 2.4H2O by using a {"}High Voltage Spray Pyrolysis{"} technique. The physical properties of the prepared films were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and physical property mesurement system (PPMS) measurements. The films studied were of a wurtzite phase with grain sizes of about 20 nm. The 5 % Co-doped ZnO films exhibited ferromagnetic behavior at room temperature. The transmission and the optical magnetic circular dichroism (MCD) measurements confirmed that Co 2+ was located at the tetrahedral sites of the ZnO wurtzite structure. MCD results showed that the observed ferromagnetism was less likely related to a carrier-induced mechanism.",

keywords = "Diluted magnetic semiconductor, Ferromagnetism, Optical magnetic circular dichroism",

author = "Hoang, {Luc Huy} and Khoi, {Nguyen The} and Hai, {Nguyen Hoang} and W. Pacuski and Yang, {In Sang}",

year = "2008",

month = may,

doi = "10.3938/jkps.52.1621",

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TY - JOUR

T1 - Magneto-optical properties of ZnO:Co nanocrystalline films

AU - Hoang, Luc Huy

AU - Khoi, Nguyen The

AU - Hai, Nguyen Hoang

AU - Pacuski, W.

AU - Yang, In Sang

PY - 2008/5

Y1 - 2008/5

N2 - Co doped ZnO films were synthesized from the precursors Zn(CH 3COO)2.2H2O and Co(CH3COO) 2.4H2O by using a "High Voltage Spray Pyrolysis" technique. The physical properties of the prepared films were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and physical property mesurement system (PPMS) measurements. The films studied were of a wurtzite phase with grain sizes of about 20 nm. The 5 % Co-doped ZnO films exhibited ferromagnetic behavior at room temperature. The transmission and the optical magnetic circular dichroism (MCD) measurements confirmed that Co 2+ was located at the tetrahedral sites of the ZnO wurtzite structure. MCD results showed that the observed ferromagnetism was less likely related to a carrier-induced mechanism.

AB - Co doped ZnO films were synthesized from the precursors Zn(CH 3COO)2.2H2O and Co(CH3COO) 2.4H2O by using a "High Voltage Spray Pyrolysis" technique. The physical properties of the prepared films were characterized by using scanning electron microscopy (SEM), X-ray diffraction (XRD) and physical property mesurement system (PPMS) measurements. The films studied were of a wurtzite phase with grain sizes of about 20 nm. The 5 % Co-doped ZnO films exhibited ferromagnetic behavior at room temperature. The transmission and the optical magnetic circular dichroism (MCD) measurements confirmed that Co 2+ was located at the tetrahedral sites of the ZnO wurtzite structure. MCD results showed that the observed ferromagnetism was less likely related to a carrier-induced mechanism.

KW - Diluted magnetic semiconductor

KW - Ferromagnetism

KW - Optical magnetic circular dichroism

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EP - 1624

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

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Magneto-optical properties of ZnO:Co nanocrystalline films

Abstract

Keywords

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