O 1s2p2p Auger Process Investigation of the Pr1-x Srx MnO3 System

  • We have measured the photon-energy dependence of the O 1s2p2p Auger line at the O K threshold,below Mn L2,3 edge of colossal magnetoresistance (CMR) materials Pr1-x Srx MnO3(PSMO) with x=0.0 and x=0.3 compositions.Experimental results show that the O 1s2p2p Auger peak splits and it can be best fitted to three component peaks.The relative intensity of the three peaks feature retain essentially similar values,in an experiment allowable error range of several percents,for both composition PSMO at O K threshold and below Mn L2,3 excitation.However,the total intensity has fluctuations indicating the feature of final state effect.This situation further changes drastically at above Mn L2,3 excitation energy by increasing the total intensity of x=0.3 system by a factor of 4 to that of x=0.0.These are discussed in terms of possible interatomic response and different valence band DOS for different PSMO compositions in the frame of covalent picture.
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QIAN Hai-Jie, SU Run, WANG Jia-Ou, WU Xiang, DONG Yu-Hui, WU Zi-Yu, WANG Yu-Tian, WEI Long, O 1s2p2p Auger Process Investigation of the Pr1-x Srx MnO3 System[J]. Chinese Physics C, 2003, 27(S1): 40-44.
QIAN Hai-Jie, SU Run, WANG Jia-Ou, WU Xiang, DONG Yu-Hui, WU Zi-Yu, WANG Yu-Tian, WEI Long, O 1s2p2p Auger Process Investigation of the Pr1-x Srx MnO3 System[J]. Chinese Physics C, 2003, 27(S1): 40-44. shu
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Received: 2003-11-21
Revised: 1900-01-01
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O 1s2p2p Auger Process Investigation of the Pr1-x Srx MnO3 System

    Corresponding author: QIAN Hai-Jie,
  • Synchrotron Radiation Laboratory,Institute of High Energy Physics,CAS,Beijing 1000392 Nuclear Analysis Laboratory,Institute of High Energy Physics,CAS,Beijing 100039,China

Abstract: We have measured the photon-energy dependence of the O 1s2p2p Auger line at the O K threshold,below Mn L2,3 edge of colossal magnetoresistance (CMR) materials Pr1-x Srx MnO3(PSMO) with x=0.0 and x=0.3 compositions.Experimental results show that the O 1s2p2p Auger peak splits and it can be best fitted to three component peaks.The relative intensity of the three peaks feature retain essentially similar values,in an experiment allowable error range of several percents,for both composition PSMO at O K threshold and below Mn L2,3 excitation.However,the total intensity has fluctuations indicating the feature of final state effect.This situation further changes drastically at above Mn L2,3 excitation energy by increasing the total intensity of x=0.3 system by a factor of 4 to that of x=0.0.These are discussed in terms of possible interatomic response and different valence band DOS for different PSMO compositions in the frame of covalent picture.

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