Electron paramagnetic resonance and crystal structure study of bis(triphenylphosphine)iminium hexafluorouranate(V)

1981 ◽  
Vol 43 (11) ◽  
pp. 2839-2842 ◽  
Author(s):  
M.P. Eastman ◽  
P. Gary Eller ◽  
G.W. Halstead
Keyword(s):  
Crystal Structure ◽  
Electron Paramagnetic Resonance ◽  
Structure Study ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Исследование Sr-допированных ферроманганитов иттербия методами ЭПР и мессбауэровской спектроскопии

2018 ◽  
Vol 60 (5) ◽  
pp. 933
Author(s):  
И.И. Нигьматуллина ◽  
В.В. Парфенов ◽  
Р.М. Еремина ◽  
Т.П. Гаврилова ◽  
И.В. Яцык
Keyword(s):  
Crystal Structure ◽  
Electron Paramagnetic Resonance ◽  
Phase Separation ◽  
Diffraction Analysis ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
Magnetic Microstructure ◽  
X Ray ◽  
Nuclear Gamma Resonance ◽  
Electron Paramagnetic

AbstractIn this paper, we have studied the crystal structure of strontium-substituted manganite and ytterbium ferromanganites Yb_0.82Sr_0.18Mn_1 – x Fe_ x O_3 ( x = 0–0.2) by using X-ray diffraction analysis. Magnetic microstructure has been studied by electron paramagnetic resonance and nuclear gamma-resonance (Mössbauer) spectroscopy. We have observed phase separation in the ceramics for antiferromagnetic, superparamagnetic, and ferromagnetic phases.

Single crystal electron paramagnetic resonance study of Y2BaCuO5, a common impurity in the high temperature superconductor, YBa2Cu3O7

1992 ◽  
Vol 7 (3) ◽  
pp. 565-571 ◽  
Author(s):  
R.J. Barham ◽  
D.C. Doetschman
Keyword(s):  
Crystal Structure ◽  
Electron Paramagnetic Resonance ◽  
Single Crystal ◽  
Crystal Field ◽  
Electron Paramagnetic Resonance Study ◽  
Epr Spectrum ◽  
Paramagnetic Resonance ◽  
Crystal Forms ◽  
Crystal Electron ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) studies of pure Y2BaCuO5 in powder and single crystal forms and of YBa2Cu3O7−δ in powder and single crystal forms provide further evidence that it is Y2BaCuO5 that is the common green impurity found in many preparations of YBa2Cu3O7−δ as a powder or in pellet forms. Y2BaCuO5 tends to be excluded in the growth of YBa2Cu3O7−δ single crystals. A method is presented for the growth of Y2BaCuO5 crystals from a flux. An apparent discrepancy between the observed single crystal EPR anisotropy and the reported crystal structure is resolved in three independent ways from the Y2BaCuO5 Powder and single crystal EPR data. These results show that the EPR spectrum is a superposition of the spectra of the two differently oriented Cu sites in the unit cell and is not a spectral average of them. The temperature independence of the EPR spectrum between 150 K and 300 K is also consistent with there being no temperature dependent exchange averaging of the EPR spectra of the two sites in this range. The orientations of the Cu crystal field axes, as indicated by the g axes, are in agreement with the crystal structure. Crystal field splittings of the Cu d-orbitals are estimated from the measured g values and indicate an appreciable covalency in the Cu–O bonds. The linewidth and its anisotropy indicate a minor degree of exchange narrowing.

Sign in / Sign up

Export Citation Format

Share Document