Temperature dependence of the spin Hamiltonian parameters in KCl:Eu2+crystals

摘要

The temperature dependence of the spin Hamiltonian parameters of Eu2+in orthorhombic sites of KCl crystals has been measured in the range 87ndash;573 K using EPR techniques. In this work, we fit an analytical expression for the predominant parameterb02as a function of temperature,b02=a0+a1T+a2coth thgr;/2T. With eight experimental points the equation forb02was fitted and the following values were obtaineda0=364.54times;10minus;4cmminus;1,a1=minus;0.03 times;10minus;4cmminus;1thinsp;Kminus;1, anda2=minus;5.72times; 104thinsp;cmminus;1. The root of the mean squared deviation between calculated and reported values is sgr;=2.03times;10minus;4cmminus;1.