1.5.5.4.2 Crystalline electric fields

2005 ◽  
pp. 184-193
Author(s):  
K. R. A. ZIEBECK ◽  
K.-U. NEUMANN
Keyword(s):  
Electric Fields ◽  
Crystalline Electric Fields

Conduction Electron Contributions to the Crystalline Electric Fields in Transition Metals

1974 ◽  
Vol 52 (11) ◽  
pp. 985-988 ◽  
Author(s):  
A. Ludwig ◽  
R. A. B. Devine
Keyword(s):  
Rare Earth ◽  
Transition Metals ◽  
Noble Metal ◽  
Electric Fields ◽  
Conduction Electron ◽  
Point Charge ◽  
Rare Earth Ions ◽  
Negative Point ◽  
Tentative Explanation ◽  
Crystalline Electric Fields

We discuss the origin of the crystalline electric fields for rare earth ions in transition and noble metal hosts, in terms of the band character of the host material and of localization and delocalization of 5d electrons on the rare earth ions. A tentative explanation is given for the almost pure negative point charge character found in Pd and Pt.

Exchange and crystalline electric fields in Sm2Fe17N

1995 ◽  
Vol 140-144 ◽  
pp. 989-990 ◽  
Author(s):  
T.S. Zhao ◽  
K.S. Pang ◽  
T.W. Lee ◽  
J.I. Lee
Keyword(s):  
Electric Fields ◽  
Crystalline Electric Fields

Crystalline electric fields in hydrated Co 2+ salts

1961 ◽  
Vol 261 (1304) ◽  
pp. 43-52 ◽  
Keyword(s):  
Magnetic Susceptibility ◽  
Electric Fields ◽  
Coupling Coefficient ◽  
Experimental Results ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Anisotropic Field ◽  
Free Ion ◽  
Crystalline Electric Fields ◽  
Field Separation

The theoretical expressions for the magnetic susceptibility and anisotropy of Co 2+ ion in hexahydrated salts have been derived on the basis of Abragam & Pryce’s theory and compared with the experimental results for three Tutton salts. Agreement with experiment is very good provided it is assumed that for each salt the value of the asymmetric field separation A varies with temperature. It appears that the magnitude of A depends more upon the alkali radicals than upon the acid radicals. The value of the spin-orbit coupling coefficient ζ in Co 2+ salts is practically the same as the free ion value, indicating very little overlap between the 3 d -Co 2+ and s . and p-O 2- charge clouds. The cubic and anisotropic field parameters G, H and I are different for divalent Co 2+ and trivalent V 3+ , as is to be expected.

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