Published December 2007 | Version v1
Journal article Metadata-only

Magnetic behaviors and enhanced magnetoresistance in granular (La0.7Pb0.3MnO3) 1-x(Fe2O3)x composites

Creators

  • 1. Department of Electrical Engineering, Hsiuping Institute of Technology, 11 Gunzye Road, Dali City, 41280 Taichung (China)
  • 2. Department of Physics, Changhua University of Education, 1 Jiu-de Road, 500 Chunghua (China)
  • 3. Department of Electronic Engineering, Hsiuping Institute of Technology, 41280 Taichung (China)
  • 4. Department of Electronic Engineering, Feng-Chia University, Taichung 407 (China)

Description

Recently, researches indicate that grain boundaries and interfaces can be the major factors of magnetoresistance effects, which has attracted renewed interests on the colossal magnetoresistance materials. In this article, the magnetic behaviours and magnetotransport properties of (La0.7Pb0.3MnO3)1-x(Fe2O3)x composites have been investigated. Ferromagnetism is gradually suppressed as the weight percentage of Fe2O3 is increased. Saturation magnetization (MS) decreases from 78.7 emu/g for x=0.0 to 60.6 emu/g for x=0.2, while ferromagnetic transition temperature (TC) remains around 346 K for all composites. The resistivity increases significantly as the x value increases in these composites. It is suggested that the introduction of Fe2O3 into the composites acts as a separation layer between La0.7Pb0.3MnO3 grains. The enhancement of magnetoresistance has been verified with the addition of Fe2O3 into the composites. (copyright 2008 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Availability note (English)

Available from: http://dx.doi.org/10.1002/pssc.200777238

Additional details

Identifiers

DOI
10.1002/pssc.200777238;

Publishing Information

Journal Title
Physica Status Solidi. C, Conferences
Journal Volume
4
Journal Issue
12
Journal Page Range
p. 4556-4559
ISSN
1610-1634

Conference

Title
International symposium on advanced magnetic materials and applications (ISAMMA 2007)
Dates
28 May - 1 Jun 2007
Place
Jeju (Korea, Republic of)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
39024006
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
COMPOSITE MATERIALS; FERROMAGNETISM; GRANULAR MATERIALS; IRON OXIDES; LANTHANUM OXIDES; LAYERS; LEAD OXIDES; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MAGNETORESISTANCE; MANGANESE OXIDES; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K; TEMPERATURE RANGE 0065-0273 K; TEMPERATURE RANGE 0273-0400 K; TRANSITION TEMPERATURE; X-RAY DIFFRACTION
Descriptors DEC
CHALCOGENIDES; COHERENT SCATTERING; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; IRON COMPOUNDS; LANTHANUM COMPOUNDS; LEAD COMPOUNDS; MAGNETIC PROPERTIES; MAGNETISM; MANGANESE COMPOUNDS; MATERIALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; TEMPERATURE RANGE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
With 4 figs., 10 refs.. SICI: 1610-1634(200712)4:12<4556::AID-PSSC200777238>3.0.TX;2-W