Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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Thermal Properties of Mn-doped LiNbO3 Crystals from Magneto-Optical Transitions

  • Park, Jung-Il (Nano-Physics and Technology Laboratory, School of Physics and Energy Sciences, Kyungpook National University)
  • Received : 2012.09.17
  • Accepted : 2012.12.10
  • Published : 2012.12.31
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Abstract

In this study, we determine that the electron paramagnetic resonance line-width (EPRLW) is axially symmetric about the c-axis and analyze the spin Hamiltonian with an isotopic g-factor of 1.9920 at a frequency of 9.5 GHz. It should be noted that the electron paramagnetic resonance signals are Lorentzian. Our findings show that the EPRLW decreases exponentially with an increase in the temperature; i.e., its temperature dependence in the range 300-400 K obeys Arrhenius behavior, this kind of temperature dependence indicates an off-center a motional narrowing of the spectrum when $Mn^{2+}$ impurity ions substitute for $Nb^{5+}$ ions. The specific heats follow a linear dependence suggesting a simple Debye $T^3$ behavior.

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