Study of the Electric Quadrupole Interaction in Antiferroelectric PbHfO3by Perturbedγ−γAngular Correlations and Mössbauer Spectroscopy

1973 ◽  
Vol 7 (3) ◽  
pp. 1039-1047 ◽  
Author(s):  
M. Forker ◽  
A. Hammesfahr ◽  
A. Lopez-García ◽  
B. Wolbeck
Keyword(s):  
Mössbauer Spectroscopy ◽  
Quadrupole Interaction ◽  
Mossbauer Spectroscopy ◽  
Electric Quadrupole ◽  
Electric Quadrupole Interaction ◽  
Mößbauer Spectroscopy

scholarly journals Quadrupole Interaction at Surfaces -Nuclear Methods

1994 ◽  
Vol 49 (1-2) ◽  
pp. 407-417 ◽  
Author(s):  
H. Haas
Keyword(s):  
Mössbauer Spectroscopy ◽  
Quadrupole Interaction ◽  
Mossbauer Spectroscopy ◽  
Electric Quadrupole ◽  
Electric Quadrupole Interaction ◽  
Metallic Surfaces ◽  
Stepped Surfaces ◽  
Mößbauer Spectroscopy ◽  
Field Gradients ◽  
Nuclear Techniques

Abstract The measurement of the electric quadrupole interaction with nuclear techniques allows the study of monolayer coverages or even isolated atoms at surfaces and interfaces due to the inherent sensitivity of these methods. Recently electric field gradients at surface atoms have been investigated with Mößbauer Spectroscopy, Polarized Beam NMR , and Perturbed Angular Correlation (PAC). The highly sensitive PAC technique with 111In and 111mCd sources, in particular, has been applied to several metal and semiconductor surfaces. The use of flat as well as stepped surfaces has allowed the assignment of the measured quadrupole interaction frequencies to specific surface sites. For the Pd(111) surface a particularly complete description is possible, since for five different sites (terrace adatoms, ledge adatoms, kink adatoms, ledge and terrace atoms) the field gradients and their orientation could be determined. They represent a challenging problem for understanding the electronic structure of metallic surfaces. Through the study of the temperature dependence of the different components the diffusion of the radioactive probe atoms can be followed. The data from 57Fe Mößbauer spectroscopy on iron surfaces with monolayer coverage and NMR surface studies of 7Li and 23Na at high temperatures are reviewed. An outlook for further developments of the nuclear techniques is presented, particularly in view of the variety of radioactive isotope beams available from on-line isotope separators like the ISOLDE facility at CERN.

Measurement of Nuclear Quadrupole Interactions using Mössbauer Spectroscopy

1996 ◽  
Vol 51 (5-6) ◽  
pp. 368-372 ◽  
Author(s):  
Desmond C. Cook
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Electric Quadrupole ◽  
Quadrupole Coupling Constant ◽  
Quadrupole Moments ◽  
Quadrupole Interactions ◽  
Mößbauer Spectroscopy ◽  
Nuclear Quadrupole Interactions ◽  
Quadrupole Coupling ◽  
Nuclear Quadrupole

Abstract Mössbauer spectroscopy is a useful probe for investigating nuclear quadrupole interactions. It enables the magnitude, sign and asymmetry of the electric quadrupole coupling constant to be determined. It is especially important for its ability to measure these parameters for excited nuclear states. The Mössbauer effect is used to measure excited state quadrupole moments in materials whose electric field gradient (EFG) is known. More commonly however, it is used to determine the EFG from which atomic bonding and electronic structure are determined. The technique also allows temperature dependent orientation of sublattice magnetization to be measured using the direction of the electric quadrupole coupling as a reference.

ELECTRON SPECTROMETER FOR MÖSSBAUER SPECTROSCOPY

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-14-C2-16
Author(s):  
T. Toriyama ◽  
K. Saneyoshi ◽  
K. Hisatake
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Electron Spectrometer ◽  
Mößbauer Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document