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Is Magnetic Circular Dichroism Surface Sensitive in the Manganese Perovskites?

Published online by Cambridge University Press:  10 February 2011

C.N. Borca ,
R.H. Cheng ,
Shane Stadler ,
Y.U. Idzerda ,
Jaewu Choi ,
D.N. Mcilroy ,
Q.L. Xu ,
S.H. Liou ,
Z.C. Zhong  and
P.A. Dowben
C.N. Borca
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
R.H. Cheng
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
Shane Stadler
Affiliation:
Naval Research Laboratory, NSLS, Upton, NY, 11973
Y.U. Idzerda
Affiliation:
Naval Research Laboratory, Mater. Phys. Branch, Washington DC, 20375, Idzerda@nrl.navy.mil
Jaewu Choi
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
D.N. Mcilroy
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
Q.L. Xu
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
S.H. Liou
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
Z.C. Zhong
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
P.A. Dowben
Affiliation:
Department of Physics and Astronomy and the Center for Materials Research and Analysis, University of Nebraska, Lincoln, NE, 68588-0111, pdowben@unl.edu
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Abstract

We compare the magnetization versus temperature, determined by magnetic circular dichroism, with bulk magnetization determined by SQUID magnetometry. The results for two different manganese perovskites, La0.65A0.35MnO3 systems (A=Pb, Sr), epitaxially grown on LaAlO3 substrates compared. The results suggest that the magnetic circular dichroism results may not be representative of the bulk magnetization. Similar materials, but with a different secondary electron mean free path lengths or different surface compositions, may thus be expected to have different behavior in MCD or MXLD that depends on a photoyield for detection.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 602: Symposium JJ – Magnetoresistive Oxides & Related Materials , 1999 , 301
Copyright
Copyright © Materials Research Society 2000

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