Direct contributions of the conduction electrons to the crystalline electric field and nuclear quadrupole interaction in rare earth metals

1970 ◽  
Vol 8 (23) ◽  
pp. 2025-2028 ◽  
Author(s):  
K.C. Das ◽  
D.K. Ray
Keyword(s):  
Rare Earth ◽  
Electric Field ◽  
Quadrupole Interaction ◽  
Rare Earth Metals ◽  
Nuclear Quadrupole Interaction ◽  
Crystalline Electric Field ◽  
Conduction Electrons ◽  
Nuclear Quadrupole

Impurity Quadrupole Interaction in Light Rare Earth Metals: 111Cd in La, Pr and Nd

1986 ◽  
Vol 41 (1-2) ◽  
pp. 99-103
Author(s):  
M. Forker ◽  
L. Freise ◽  
D. Simon
Keyword(s):  
Rare Earth ◽  
Quadrupole Interaction ◽  
Perturbed Angular Correlation ◽  
Rare Earth Metals ◽  
Nuclear Quadrupole Interaction ◽  
Light Rare Earth ◽  
Quadrupole Frequency ◽  
Time Differential ◽  
Temperature And Pressure ◽  
Nuclear Quadrupole

The nuclear quadrupole interaction of dilutelight rare earth (RE) metals La, Pr and Nd by time differential perturbed angular correlationmeasurements. The quadrupole frequency νQ has been determined in Pr as a function oftemperature and pressure, in Nd as a function of temperature, and in La at 19 K. The pressuredependence of νQ of 111Cd in Pr ((d In νQ/d P)290 K = + 2.7 (2.3) · 10-3 Kbar-1) is a factor of3 - 4 weaker than in the heavy RE metals Gd to Er. At the same time the temperature dependenceof νQ in the light RE is up to a factor of 3 stronger than in the heavy RE. Between 300 K and900 K. the quadrupole frequency is a linear function of temperature with the same slope(d In νQ/dT)290 k = - 8.4(2) · 10-4 K-1 both in Pr and Nd. Between 25 K and 300 K the decrease is stronger than linear, and more pronounced in Pr than in Nd. The temperature coefficient(d In νQ/dT)290 k is found to decrease linearly with the RE atomic number across both the seriesof the fight and the heavy RE metals.

Lattice Locations of 12B in CaB6

2002 ◽  
Vol 57 (6-7) ◽  
pp. 617-619 ◽  
Author(s):  
M. Mihara ◽  
K. Hashimoto ◽  
K. Arimura ◽  
S. Kudo ◽  
K. Akutsu ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Field Gradient ◽  
Field Gradient ◽  
Quadrupole Interaction ◽  
Room Temperature ◽  
Nuclear Quadrupole Interaction ◽  
Nmr Studies ◽  
Nuclear Quadrupole ◽  
Lattice Locations ◽  
La Doped

The nuclear quadrupole interaction of the short-lived -emitter 12B implanted into CaB6 crystal has been studied by means of modified β-NMR (β-NQR) technique. The electric field gradient at the implanted 12B was found to be = q-(1.34±0.05)x1021 V/m2 at room temperature. From this result it is concluded that the 12B probe nuclei are mainly implanted in the substitutional boron site and are applicable to systematic NMR studies of ferromagnetic La doped CaB6

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