Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1097
Title: Direct measurement of the charge ordering gap in Nd0.5Sr0.5MnO3 using vacuum tunnelling
Authors: Biswas, Amalan
Raychaudhuri, A K
Mahendiran, R
Guha, A
Mahesh, R
Rao, C N R
Keywords: Insulator-Metal Transition
Magnetoresistance
Issue Date: 16-Jun-1997
Publisher: IOP Publishing Ltd
Citation: Journal Of Physics D: Applied Physics 9(24), L355-L360 (1997)
Abstract: We have used tunnelling spectroscopy (TS) to probe the density of states (DOS) of the rare earth manganate Nd0:5Sr0:5MnO3, which shows a transition to a charge ordered (CO) antiferromagnetic insulating state from a ferromagnetic metallic state. We find that a gap opens up in the DOS around the Fermi level, EF , as the solid is cooled below the charge ordering temperature TCO. The charge ordering gap (1CO) was found to be strongly temperature dependent for T∼TCO and for T/TCO < 0:6 it reaches a limiting value of nearly 0.27 eV. Above TCO the temperature dependence of the DOS at EF was found to be similar to that of the solids such as La0:8Ca0:2MnO3 which show colossal magnetoresistance but no charge ordering.
Description: Letter. Restricted Access.
URI: http://hdl.handle.net/10572/1097
Other Identifiers: 0953-8984
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

Files in This Item:
File Description SizeFormat 
sl.no14.1997 J. Phys Condens. Matter 9, L355.pdf
  Restricted Access
97.66 kBAdobe PDFView/Open Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.