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Photo-induced magnetism of Pr0.65Ca0.35MnO3 in powder and thin films

Published online by Cambridge University Press:  17 March 2011

Takanobu Otagiri ,
Masato Arai ,
Masakazu Kodaira ,
Osami Yanagisawa  and
Mitsuru Izumi
Takanobu Otagiri
Affiliation:
Laboratory of Applied Physics, Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima, Koto-ku, Tokyo 135-8533, Japan
Masato Arai
Affiliation:
Laboratory of Applied Physics, Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima, Koto-ku, Tokyo 135-8533, Japan
Masakazu Kodaira
Affiliation:
Laboratory of Applied Physics, Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima, Koto-ku, Tokyo 135-8533, Japan
Osami Yanagisawa
Affiliation:
Yuge National College of Maritime Technology, 1000 Shimoyuge, Yuge-cho, Ochi-gun, Ehime 794-2593, Japan
Mitsuru Izumi
Affiliation:
Laboratory of Applied Physics, Tokyo University of Marine Science and Technology 2-1-6 Etchu-jima, Koto-ku, Tokyo 135-8533, Japan
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Abstract

The photo-induced magnetism was originally found in Pr0.65Ca0.35MnO3 powder by the ESR and x-ray diffraction studies. However, the mechanism of the photo-induce magnetism was under cover for a long time. Now, D.C. magnetization measurement under a near infrared pulsed laser irradiation (hν = 1.18 eV) reveals the mechanism. The D.C. magnetization prominently increases (approximately 6 %) under the laser irradiation, especially around 90 K near the canted antiferromagnetic (CAF) – antiferromagnetic (AF) transition. The result is consistent with the previous studies and indicates that a CAF – ferromagnetic transition is caused associating with the charge-order (CO) – charge-delocalize (CD) (insulator – metal) transition by the laser irradiation. As the second step for development, the thin films were prepared with the pellet of Pr0.65Ca0.35MnO3 in the on-axis and off-axis geometry of RF magnetron sputtering deposition. The off-axis geometry provides the Pr0.65Ca0.35MnO3 film same as powder composition and the on-axis sputtering fortunately provides the Pr0.99Ca0.01MnO3 film. Both films show photo-induced magnetism. The present photo-induced magnetism is coming from a spin-canted phase in both compounds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 811: Symposia D/E – Integration of Advanced Micro-and Nanelectronic Devices-Critical Issues and Solutions , 2004 , E2.10
Copyright
Copyright © Materials Research Society 2004

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References

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