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http://dx.doi.org/10.4283/JMAG.2014.19.2.116

Activation Energy of 69Ga, 71Ga, and 75As Nuclei in GaAs:Mn2+ Single Crystal  

Yeom, Tae Ho (Department of Laser and Optical Information Engineering, Cheongju University)
Lim, Ae Ran (Department of Science Education, Jeonju University)
Publication Information
Journal of Magnetics / v.19, no.2, 2014 , pp. 116-120 More about this Journal
Abstract
The spin-lattice relaxation time, $T_1$, for $^{69}Ga$, $^{71}Ga$, and $^{75}As$ nuclei in GaAs:$Mn^{2+}$ single crystals was measured as a function of temperature. The values of $T_1$ for $^{69}Ga$, $^{71}Ga$, and $^{75}As$ nuclei were found to decrease with increasing temperature. The $T_1$ values in GaAs:$Mn^{2+}$ crystal are similar to those in pure GaAs crystal. The calculated activation energies for the $^{69}Ga$, $^{71}Ga$, and $^{75}As$ nuclei are 4.34, 4.07, and 3.99 kJ/mol. It turns out that the paramagnetic impurity effect of $Mn^{2+}$ ion doped in GaAs single crystal was not strong on the spin-lattice relaxation time.
Keywords
paramagnetic ions; nuclear magnetic resonance (NMR); activation energy; relaxation time;
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