The local environment of Cr3+ impurities in normal and x-rays irradiated carbon doped ruby: An electron paramagnetic resonance (EPR) study
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Local environment of substitutional paramagnetic point defect (impurity) in normal and x-ray irradiated commercially available alpha-Al2O3:C samples (commercial product of Landauer, Inc.) has been studied by using the electron paramagnetic resonance (EPR) technique at room temperature. In both samples the EPR spectra showed strongly angular dependent behavior. The zero-field splitting (ZFS) parameters (ZFSPs) have been determined for substitutional Cr3+ centers. The observed additional EPR signals for x-ray irradiated sample were attributed to another center with different spin Hamiltonian (SH) parameters. In addition to the experimental findings, the ZESPs and the local structure of the Cr3+ ions were theoretically determined using superposition model (SPM) calculations. (C) 2014 Elsevier B.V. All rights reserved.
Açıklama
International Conference on Nanoscale Magnetism (ICNM-2013) -- SEP 02-06, 2013 -- Istanbul, TURKEY
Anahtar Kelimeler
Irradiation, Electron paramagnetic resonance, Zero-field splitting, Cr3+
Kaynak
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
373
