Localized ferromagnetic charge ordering through charge density analysis in nano sized diluted magnetic semiconductor Co2+:ZnO

K. S. Syed Ali; R. Saravanan; S. Israel; M. Açikgöz; L. Arda

doi:10.1016/j.physb.2010.01.036

Localized ferromagnetic charge ordering through charge density analysis in nano sized diluted magnetic semiconductor Co²⁺:ZnO

K. S. Syed Ali, R. Saravanan, S. Israel, M. Açikgöz, L. Arda

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

27 Citations (Scopus)

Abstract

Nano sized diluted magnetic semiconductor Co²⁺:ZnO (with composition Zn_0.99Co_0.01O) was prepared by sol-gel method and studied for the effect of annealing on ferromagnetic charge ordering using charge density studies. Powder XRD data sets of the samples annealed at various temperatures (500, 600, 700, 800 and 900 °C) have been investigated by the Rietveld refinement analysis and the charge density distribution using the maximum entropy method (MEM). The mid bond electron densities between the Zn(Co) and O atoms are analyzed to understand the origin of ferromagnetic behaviour between the temperature range 600-700 °C. Zn_0.99Co_0.01O is found to switch "on" the ferromagnetic behaviour range 600-700 °C and then to switch "off". The charge ordering that results in ferromagnetic occurrence is dealt for the first time through charge density route.

Original language	English
Pages (from-to)	1763-1769
Number of pages	7
Journal	Physica B: Condensed Matter
Volume	405
Issue number	7
DOIs	https://doi.org/10.1016/j.physb.2010.01.036
Publication status	Published - 1 Apr 2010
Externally published	Yes

Keywords

Electronic structure of bulk materials
Magnetic semiconductors
Studies of specific magnetic materials
X-ray diffraction

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10.1016/j.physb.2010.01.036

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abstract = "Nano sized diluted magnetic semiconductor Co2+:ZnO (with composition Zn0.99Co0.01O) was prepared by sol-gel method and studied for the effect of annealing on ferromagnetic charge ordering using charge density studies. Powder XRD data sets of the samples annealed at various temperatures (500, 600, 700, 800 and 900 °C) have been investigated by the Rietveld refinement analysis and the charge density distribution using the maximum entropy method (MEM). The mid bond electron densities between the Zn(Co) and O atoms are analyzed to understand the origin of ferromagnetic behaviour between the temperature range 600-700 °C. Zn0.99Co0.01O is found to switch {"}on{"} the ferromagnetic behaviour range 600-700 °C and then to switch {"}off{"}. The charge ordering that results in ferromagnetic occurrence is dealt for the first time through charge density route.",

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AU - Syed Ali, K. S.

AU - Saravanan, R.

AU - Israel, S.

AU - Açikgöz, M.

AU - Arda, L.

PY - 2010/4/1

Y1 - 2010/4/1

N2 - Nano sized diluted magnetic semiconductor Co2+:ZnO (with composition Zn0.99Co0.01O) was prepared by sol-gel method and studied for the effect of annealing on ferromagnetic charge ordering using charge density studies. Powder XRD data sets of the samples annealed at various temperatures (500, 600, 700, 800 and 900 °C) have been investigated by the Rietveld refinement analysis and the charge density distribution using the maximum entropy method (MEM). The mid bond electron densities between the Zn(Co) and O atoms are analyzed to understand the origin of ferromagnetic behaviour between the temperature range 600-700 °C. Zn0.99Co0.01O is found to switch "on" the ferromagnetic behaviour range 600-700 °C and then to switch "off". The charge ordering that results in ferromagnetic occurrence is dealt for the first time through charge density route.

AB - Nano sized diluted magnetic semiconductor Co2+:ZnO (with composition Zn0.99Co0.01O) was prepared by sol-gel method and studied for the effect of annealing on ferromagnetic charge ordering using charge density studies. Powder XRD data sets of the samples annealed at various temperatures (500, 600, 700, 800 and 900 °C) have been investigated by the Rietveld refinement analysis and the charge density distribution using the maximum entropy method (MEM). The mid bond electron densities between the Zn(Co) and O atoms are analyzed to understand the origin of ferromagnetic behaviour between the temperature range 600-700 °C. Zn0.99Co0.01O is found to switch "on" the ferromagnetic behaviour range 600-700 °C and then to switch "off". The charge ordering that results in ferromagnetic occurrence is dealt for the first time through charge density route.

KW - Electronic structure of bulk materials

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KW - Studies of specific magnetic materials

KW - X-ray diffraction

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Localized ferromagnetic charge ordering through charge density analysis in nano sized diluted magnetic semiconductor Co²⁺:ZnO

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Keywords

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