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Strain induced super-paramagnetism in Cr2O3 in the ultra thin film limit

Published online by Cambridge University Press:  13 January 2015

Iori Tanabe ,
Haseeb Kazi ,
Yuan Cao ,
Jack L Rodenburg ,
Takashi Komesu ,
Bin Dong ,
Frank L Pasquale ,
M. Sky Driver ,
Jeffry A Kelber  and
Peter A Dowben
Iori Tanabe
Affiliation:
Department of Physics and Astronomy, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska, PO Box 880299, Lincoln, NE 68588-0299, U.S.A.
Haseeb Kazi
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
Yuan Cao
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
Jack L Rodenburg
Affiliation:
Department of Physics and Astronomy, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska, PO Box 880299, Lincoln, NE 68588-0299, U.S.A.
Takashi Komesu
Affiliation:
Department of Physics and Astronomy, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska, PO Box 880299, Lincoln, NE 68588-0299, U.S.A.
Bin Dong
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
Frank L Pasquale
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
M. Sky Driver
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
Jeffry A Kelber
Affiliation:
Department of Chemistry, University of North Texas, 1155 Union Circle, #305070, Denton, TX 76203-5017, U.S.A.
Peter A Dowben
Affiliation:
Department of Physics and Astronomy, Theodore Jorgensen Hall, 855 North 16th Street, University of Nebraska, PO Box 880299, Lincoln, NE 68588-0299, U.S.A.
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Abstract

Ultra thin films of chromia (Cr2O3), less than 3 nm thick, grown epitaxial on α-Al2O3 (sapphire), and are thus compressively strained in-plane. The resulting films show evidence of some magnetic ordering above the Néel temperature of chromia (307 K). The observed higher temperature hysteresis effect observed are very likely a strain effect, and not associated with the typical antiferromagnetic ordering expected of chromia.

Keywords

Crmagnetic propertiesepitaxy
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1729: Symposium M – Materials and Technology for Nonvolatile Memories , 2015 , pp. 79 - 83
Copyright
Copyright © Materials Research Society 2015 

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