X-ray Photoemission Spectroscopy Study of Cation-Deficient La<TEX>$_{0.970}$</TEX>Mn<TEX>$_{0.970}$</TEX>O<TEX>$_3$</TEX> System

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J. Korean Ceram. Soc. > Volume 36(1); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(1): 50.

양이온 결손 La$_{0.970}$Mn$_{0.970}$O$_3$의 X-ray Photoemission Spectroscopy 관측

정우환

호원대학교 전자공학과

X-ray Photoemission Spectroscopy Study of Cation-Deficient La$_{0.970}$Mn$_{0.970}$O$_3$ System

ABSTRACT

We have measured the x-ray photoemission spectroscopy of cation deficient La0.970Mn0.970O3 as a function of temperature. Detailed results on the chemical shifts and changes in Mn 2p and Lp 3d core levels due to variation of temperature have been obtained. The Mn 2p 3/2 and 1/2 main peaks and La 3d core spectrum shift to lower binding energy levels with increasing temperature. This XPS behavior is correlated with the strength of localization of Mn3+. The Jahn-Teller effect due to Mn3+ besides the conventional random potential effects is likely to localize charge carriers in La-.970Mn0.970O3.

Key words: X-ray photoemission spectroscopy, Jahn-Teller effect, Small polaron, Conventional random potential effect