UNSPECIFIED (1998) Magnetic properties of(Pr(Ca, Sr))MnO3 studied by nuclear magnetic resonance. In: 7th Joint Magnetism and Magnetic Materials / International Magnetics Conference, JAN 06-09, 1998, SAN FRANCISCO, CALIFORNIA.

Full text not available from this repository.

Abstract

The valence state of Mn in magnetoresistive perovskites has been widely related to the level of alkaline metal substitution of the rare earth, by assuming that the Mn exists in 3 + or 4+ valence states. Measurements have been made on a series of samples in the system Pr1-(x+y)(CaxSryMnO3. Mn-55 nuclear magnetic resonance (NMR) zero field spin echo measurements on a single crystal with x=0.1 and y = 0 show distinct resonances around 310 MHz (Mn4+) and 400 MHz (Mn3+) but also at 590 MHz (Mn2+). An increase in the Mn2+ resonance frequency in an applied field implies that the Mn2+ moment is antiferromagnetically coupled to the net magnetization. Spectra from powder samples are much broader. The resonance frequencies increase as the Pr content is reduced. For systems with x + y = 0.4, there is little change in the NMP spectrum as the proportions of Ca and Sr are altered. (C) 1998 American Institute of Physics. [S0021-8979(98)26511-X].

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF APPLIED PHYSICS
Publisher:	AMER INST PHYSICS
ISSN:	0021-8979
Date:	1 June 1998
Volume:	83
Number:	11 Part 2
Number of Pages:	3
Page Range:	pp. 7151-7153
Publication Status:	Published
Title of Event:	7th Joint Magnetism and Magnetic Materials / International Magnetics Conference
Location of Event:	SAN FRANCISCO, CALIFORNIA
Date(s) of Event:	JAN 06-09, 1998
URI:	http://wrap.warwick.ac.uk/id/eprint/15001

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item