Perturbed angular correlation studies of chemically generated electric field gradients in Hf compounds

1978 ◽  
Vol 69 (1) ◽  
pp. 117 ◽  
Author(s):  
Jane W. Ball ◽  
Morton Kaplan
Keyword(s):  
Electric Field ◽  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
Electric Field Gradients ◽  
Correlation Studies ◽  
Field Gradients

scholarly journals Electric Field Gradients at the In Site in Au-In Compounds

1998 ◽  
Vol 53 (6-7) ◽  
pp. 349-354 ◽  
Author(s):  
P. Wodniecki ◽  
A. Kulińska ◽  
B. Wodniecka ◽  
A. Z. Hrynkiewicz
Keyword(s):  
High Temperature ◽  
Electric Field ◽  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
High Temperature Phase ◽  
Correlation Technique ◽  
Temperature Phase ◽  
Electric Field Gradients ◽  
Field Gradients ◽  
Temperature Dependences

Abstract The quadrupole interaction in Au-In compounds of different stoichiometrics was studied with the perturbed angular correlation technique. The electric field gradients at 111Cd probes were measured and the temperature dependences of the quadrupole frequencies were determined. A new high temperature phase of Auln above 630 K and a new metastable modification of Au7In3 were found.

Angular Correlation Studies of Electric Field Gradients in Dilute Silver Alloys

1964 ◽  
Vol 135 (1A) ◽  
pp. A206-A217 ◽  
Author(s):  
George W. Hinman ◽  
Gilbert R. Hoy ◽  
Joseph K. Lees ◽  
John C. Serio
Keyword(s):  
Electric Field ◽  
Angular Correlation ◽  
Electric Field Gradients ◽  
Silver Alloys ◽  
Correlation Studies ◽  
Field Gradients

scholarly journals Perturbed angular correlation investigation of the electric field gradient at 181Ta probe in the Hf2Ni7 compound

2012 ◽  
Vol 27 (2) ◽  
pp. 95-102
Author(s):  
Bozidar Cekic ◽  
Ana Umicevic ◽  
Valentin Ivanovski ◽  
Rongwei Hu ◽  
Cedomir Petrovic ◽  
...  
Keyword(s):  
High Temperature ◽  
Electric Field ◽  
Angular Correlation ◽  
Quadrupole Interaction ◽  
Magnetic Order ◽  
Perturbed Angular Correlation ◽  
X Ray Diffraction ◽  
Electric Field Gradients ◽  
X Ray ◽  
Field Gradients

The perturbed angular correlation method was employed to study the temperature dependence of electric field gradients at the 181Ta probe in the polycrystalline Hf2Ni7 compound. The temperature evolution of the sample content was measured using high-temperature X-ray diffraction. To check the magnetic order of the sample, magnetization measurements and additional perturbed angular correlation measurements with externally applied magnetic field were performed. All obtained spectra showed no evidence of magnetic order of the Hf2Ni7 phase. Within the experimental resolution of the apparatus, the measured electric field gradients at 181Ta probe for the two inequivalent 181Hf/181Ta sites in the Hf2Ni7 compound appeared as one in the range of 78-944 K. A single quadrupole interaction implies that the electric field gradients at the two Hf sites must be quite similar. At 293 K, the measured quadrupole interaction parameters are ?Q = 433(1) MHz and ? = 0.300(4). An increase of the quadrupole frequency and a gradual rising of the asymmetry parameter were observed with increasing temperature. The high-temperature X-ray diffraction indicated a build up of HfO2 above 693 K.

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