Unusual magnetic phase transitions in Gd 3+ clusters in multicomponent oxide glasses

Janis Kliava; Alexander Malakhovskii; Irina Edelman; Anatoly Potseluyko; Eleonora Petrakovskaja; Ishai Bruckental; Yosef Yeshurun; Tat'Jana Zarubina

doi:10.1007/s10948-006-0116-4

Unusual magnetic phase transitions in Gd ³⁺ clusters in multicomponent oxide glasses

Janis Kliava, Alexander Malakhovskii, Irina Edelman, Anatoly Potseluyko, Eleonora Petrakovskaja, Ishai Bruckental, Yosef Yeshurun, Tat'Jana Zarubina

Department of Physics

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

7 Scopus citations

Abstract

Magnetic susceptibility, EPR and optical properties have been studied in a glass system {20La ₂O ₃-22Al ₂O ₃-23∈B ₂O ₃-35(SiO ₂+GeO ₂)} with a part of La ₂O ₃ substituted by Gd ₂O ₃ in different concentrations. Positive Weiss constants have been found in more heavily doped glasses; two magnetic transitions at 55 and 12 K have been detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters of Gd ³⁺ ions. The EPR spectra confirm the clustering at higher Gd contents. At low temperatures the cluster-related resonance indicates an onset of magnetic anisotropy. The clustering, depending on the Gd concentration, correlates with a shift to lower energies of the strong optical absorption band edge.

Original language	English
Pages (from-to)	149-153
Number of pages	5
Journal	Journal of Superconductivity and Novel Magnetism
Volume	20
Issue number	2 SPECIAL ISSUE
DOIs	https://doi.org/10.1007/s10948-006-0116-4
State	Published - Feb 2007

Bibliographical note

Funding Information:
The work is supported partly by Krasnoyarsk Regional Science Foundation, grant No 12F0045C. A. V. Malakhovskii thanks the Israel Ministry of Absorption for a KAMEA scholarship. A. Potseluyko thanks the Russian Science Support Foundation.

Funding

The work is supported partly by Krasnoyarsk Regional Science Foundation, grant No 12F0045C. A. V. Malakhovskii thanks the Israel Ministry of Absorption for a KAMEA scholarship. A. Potseluyko thanks the Russian Science Support Foundation.

Funders	Funder number
Israel Ministry of Absorption
Krasnoyarsk Regional Science Foundation	12F0045C
Russian Science Support Foundation

Keywords

Gadolinium
Magnetic clusters
Oxide glasses
Superparamagnetism

Access to Document

10.1007/s10948-006-0116-4

Cite this

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title = "Unusual magnetic phase transitions in Gd 3+ clusters in multicomponent oxide glasses",

abstract = "Magnetic susceptibility, EPR and optical properties have been studied in a glass system {20La 2O 3-22Al 2O 3-23∈B 2O 3-35(SiO 2+GeO 2)} with a part of La 2O 3 substituted by Gd 2O 3 in different concentrations. Positive Weiss constants have been found in more heavily doped glasses; two magnetic transitions at 55 and 12 K have been detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters of Gd 3+ ions. The EPR spectra confirm the clustering at higher Gd contents. At low temperatures the cluster-related resonance indicates an onset of magnetic anisotropy. The clustering, depending on the Gd concentration, correlates with a shift to lower energies of the strong optical absorption band edge.",

keywords = "Gadolinium, Magnetic clusters, Oxide glasses, Superparamagnetism",

author = "Janis Kliava and Alexander Malakhovskii and Irina Edelman and Anatoly Potseluyko and Eleonora Petrakovskaja and Ishai Bruckental and Yosef Yeshurun and Tat'Jana Zarubina",

note = "Funding Information: The work is supported partly by Krasnoyarsk Regional Science Foundation, grant No 12F0045C. A. V. Malakhovskii thanks the Israel Ministry of Absorption for a KAMEA scholarship. A. Potseluyko thanks the Russian Science Support Foundation.",

year = "2007",

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doi = "10.1007/s10948-006-0116-4",

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AU - Kliava, Janis

AU - Malakhovskii, Alexander

AU - Edelman, Irina

AU - Potseluyko, Anatoly

AU - Petrakovskaja, Eleonora

AU - Bruckental, Ishai

AU - Yeshurun, Yosef

AU - Zarubina, Tat'Jana

N1 - Funding Information: The work is supported partly by Krasnoyarsk Regional Science Foundation, grant No 12F0045C. A. V. Malakhovskii thanks the Israel Ministry of Absorption for a KAMEA scholarship. A. Potseluyko thanks the Russian Science Support Foundation.

PY - 2007/2

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N2 - Magnetic susceptibility, EPR and optical properties have been studied in a glass system {20La 2O 3-22Al 2O 3-23∈B 2O 3-35(SiO 2+GeO 2)} with a part of La 2O 3 substituted by Gd 2O 3 in different concentrations. Positive Weiss constants have been found in more heavily doped glasses; two magnetic transitions at 55 and 12 K have been detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters of Gd 3+ ions. The EPR spectra confirm the clustering at higher Gd contents. At low temperatures the cluster-related resonance indicates an onset of magnetic anisotropy. The clustering, depending on the Gd concentration, correlates with a shift to lower energies of the strong optical absorption band edge.

AB - Magnetic susceptibility, EPR and optical properties have been studied in a glass system {20La 2O 3-22Al 2O 3-23∈B 2O 3-35(SiO 2+GeO 2)} with a part of La 2O 3 substituted by Gd 2O 3 in different concentrations. Positive Weiss constants have been found in more heavily doped glasses; two magnetic transitions at 55 and 12 K have been detected and ascribed, respectively, to ferromagnetic and antiferromagnetic clusters of Gd 3+ ions. The EPR spectra confirm the clustering at higher Gd contents. At low temperatures the cluster-related resonance indicates an onset of magnetic anisotropy. The clustering, depending on the Gd concentration, correlates with a shift to lower energies of the strong optical absorption band edge.

KW - Gadolinium

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KW - Oxide glasses

KW - Superparamagnetism

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