MÖSSBAUER EFFECT STUDY OF THE EU-Y-Ba-Cu-O SUPERCONDUCTOR

1987 ◽  
Vol 01 (02) ◽  
pp. 491-494
Author(s):  
Weiming Xu ◽  
Xiaoxiang Liu ◽  
Mingzhi Jin ◽  
Lanying He ◽  
Yifeng Wang ◽  
...  
Keyword(s):  
Isomer Shift ◽  
Mössbauer Effect ◽  
Single Phase ◽  
Hyperfine Interactions ◽  
Effect Study ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray ◽  
Zero Resistance ◽  
The Eu

In this work the hyperfine interactions of (EuxY1−x)0.3Ba0.1CuO3(x=0.5, 0.7, 1.0) superconductors have been studied by 151Eu Mössbauer effect. X-ray diffraction shows that the materials are of single phase. Mössbauer spectra were measured at 300K and 83K. The results show that Eu ions are in the trivalent oxidation state. The isomer shift decreases with the increasing of composition x. The electron density at the 151Eu nuclei is decreased below the zero resistance temperature.

Magnetic and 119-Sn Mössbauer Effect Study of Sn-Doped Pb2Sr2Eu.5Cu3-xSnxO8+z (x = 0.0, 0.1) Superconductors

1989 ◽  
Vol 169 ◽  
Author(s):  
P. P. Vaishnava ◽  
C. D. Nelson ◽  
W. P. Pratt
Keyword(s):  
Magnetic Susceptibility ◽  
Mössbauer Effect ◽  
Single Phase ◽  
Effect Study ◽  
Site Symmetry ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray ◽  
Fraction Increase ◽  
Meissner Fraction

AbstractX-ray diffraction, magnetic susceptibility and 119-Sn Mössbauer effect measurements have been performed on Pb2Sr2Eu.5Cu3-xSnx08+z (x = 0.0, 0.1) superconductors. The x-ray diffraction pattern indicated that the samples are single phase materials. The diamagnetic shielding and the Meissner fraction increase with the introduction of Sn in the lattice. The 119-Sn Mössbauer effect measurements have been used to determine the site symmetry and valence state of Sn atom in the superconductor.

X-ray diffraction and Mössbauer-effect study of the decagonalAl7(Mn1−xFex)2alloy

1987 ◽  
Vol 35 (6) ◽  
pp. 3005-3008 ◽  
Author(s):  
B. Koopmans ◽  
P. J. Schurer ◽  
F. van der Woude ◽  
P. Bronsveld
Keyword(s):  
Mössbauer Effect ◽  
Effect Study ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray

X-ray diffraction and Mössbauer effect study of site occupation and magnetic properties in UCuxFe5−xAl7 (x=2, 3.5) alloys

2009 ◽  
Vol 404 (8-11) ◽  
pp. 1102-1111 ◽  
Author(s):  
P. Gaczyński ◽  
A. Pikul ◽  
W. Suski ◽  
O. Sologub ◽  
K. Wochowski ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Mössbauer Effect ◽  
Effect Study ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray ◽  
Site Occupation

X-Ray diffraction and 155Gd-Mössbauer effect study of GdMn2Hx (0≤x≤4.3)

1997 ◽  
Vol 261 (1-2) ◽  
pp. 47-53 ◽  
Author(s):  
J. Żukrowski ◽  
M. Strecker ◽  
G. Wortmann ◽  
J. Przewoźnik ◽  
K. Krop
Keyword(s):  
Mössbauer Effect ◽  
Effect Study ◽  
X Ray Diffraction ◽  
Mossbauer Effect ◽  
X Ray

On the composition of delafossite

1968 ◽  
Vol 36 (281) ◽  
pp. 643-650 ◽  
Author(s):  
H. Wiedersich ◽  
J. W. Savage ◽  
A. H. Muir ◽  
D. G. Swarthout
Keyword(s):  
Solid State ◽  
Isomer Shift ◽  
Solid State Reaction ◽  
Mössbauer Effect ◽  
Mossbauer Effect ◽  
Stable Compound ◽  
X Ray ◽  
Mössbauer Isomer Shift ◽  
Approximate Composition ◽  
Chemical Techniques

SummaryOxides of the Cu-Fe-O system prepared by solid-state reaction methods have been investigated by X-ray, Mössbauer effect, and analytical chemical techniques. In agreement with most previous investigations of this system, it is found that CuFeO2 exists as a stable compound, and that the mineral delafossite has essentially this composition. These results are in disagreement with those of Buist, Gadalla, and White who propose that delafossite has an approximate composition Cu6Fe3O7 instead of CuFeO2. In fact, a compound of composition Cu6F3O7 could not be prepared. The Mössbauer isomer shift provides confirmation that the iron in CuFeO2 is trivalent.

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