UNSPECIFIED (2002) Microwave properties of Nd0.5Sr0.5MnO3: a key role of the (x(2)-y(2))-orbital effects. SOLID STATE COMMUNICATIONS, 121 (2-3). pp. 117-121. ISSN 0038-1098

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Abstract

Transmittance of the colossal magnetoresistive compound Nd0.5Sr0.5MnO3 showing metal-insulator phase transition has been studied by means of the submm- and mm-wavelength band spectroscopy. An unusually high transparency of the material provided direct evidence for the significant suppression of the coherent Drude-weight in the ferromagnetic metallic State. Melting of the A-type antiferromagnetic states has been found to be responsible for a considerable increase in the microwave transmission, which was observed at the transition from the insulating to the metallic phase induced by magnetic field or temperature. This investigation confirmed a dominant role of the (x(2)-y(2))-orbital degree of freedom in the low-energy optical properties of Nd0.5Sr0.5MnO3 and other doped manganites with planar (x(2)-y(2))-orbital order, as predicted theoretically. The results are discussed ill terms of the orbital-liquid concept. (C) 2002 Elsevier Science Ltd. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	SOLID STATE COMMUNICATIONS
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
ISSN:	0038-1098
Date:	2002
Volume:	121
Number:	2-3
Number of Pages:	5
Page Range:	pp. 117-121
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/11331

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