Exchange Interaction and Cubic Crystal Field Splitting Parameter of Fe3+ in Spinel Structure

1960 ◽  
Vol 15 (7) ◽  
pp. 1217-1222 ◽  
Author(s):  
Yoshikazu Sugiura
Keyword(s):  
Exchange Interaction ◽  
Crystal Field ◽  
Spinel Structure ◽  
Crystal Field Splitting ◽  
Field Splitting ◽  
Cubic Crystal ◽  
Splitting Parameter

2F5/2 Manifold Splitting of Ce3+ in PbCeX (X= Te, Se, S): A Magnetic Susceptibility Study

2012 ◽  
Vol 190 ◽  
pp. 545-549
Author(s):  
X. Gratens ◽  
Samih Isber ◽  
S. Charar ◽  
Z. Golacki
Keyword(s):  
Magnetic Susceptibility ◽  
Crystal Field ◽  
Crystal Field Splitting ◽  
Field Splitting ◽  
Cubic Crystal ◽  
X Band ◽  
Susceptibility Study ◽  
Electron Paramagnetic ◽  
Magnetic Susceptibility Study ◽  
Landé Factors

The magnetic susceptibility of Pb1-xCexX (X = S, Se and Te) crystals with several Cerium concentrations ranging from x = 0.006 to 0.036 has been measured between 2 K and 300 K. The experimental susceptibility curves were found to be consistent with a 2F5/2 lowest manifold for Ce3+ ions; the cubic crystal-field splitting values of 2F5/2 were estimated to be about 340 K, 440 K and 540 K for Pb1-xCexTe, Pb1-xCexSe, and Pb1-xCexS, respectively. For all the studied samples, it was found that the 7 doublet lies below the 8 quadruplet. These results confirm that Ce3+ ions substitute Pb2+ in the host crystals. Furthermore, the effective Landé factors were determined by X-band (~9.5 GHz) Electron Paramagnetic Measurements (EPR) to be g = 1.333, 1.364, and 1.402 for Ce ions in PbX, X = S, Se, and Te, respectively.

Crystal field effects and the co-operative state II. The cubic LnNi 2 compounds

1963 ◽  
Vol 276 (1364) ◽  
pp. 28-38 ◽  
Keyword(s):  
Exchange Interaction ◽  
Crystal Field ◽  
Preceding Paper ◽  
Crystal Field Splitting ◽  
Satisfactory Explanation ◽  
Field Splitting ◽  
Field Effects ◽  
Curie Temperatures

The theory of the preceding paper is applied to the cubic LnNi 2 compounds, and shown to give a satisfactory explanation of the observed saturation moments and Curie temperatures. The overall crystal field splitting is between 100 and 300 °K for all ions (except Gd3+), and the exchange interaction —2 f S.S. requires values between f/k — 2 and 6°K.

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