Kalanda, Nikolay ORCID: 0000-0001-7679-4968, Yarmolich, Marta ORCID: 0000-0002-8005-2171, Teichert, Steffen, Bohmann, Arne, Petrov, Alexander ORCID: 0000-0003-1208-5913, Moog, Daniel and Mathur, Sanjay (2018). Charge transfer mechanisms in strontium ferromolybdate with tunneling barriers. J. Mater. Sci., 53 (11). S. 8347 - 8355. NEW YORK: SPRINGER. ISSN 1573-4803

Full text not available from this repository.

Abstract

The single-phase strontium ferromolybdate powder with the double perovskite structure has been synthesized by the citrate-gel method with superstructural ordering of iron and molybdenum cations of 88%. The formation of the SrMoO4 phase on the intergrain boundaries has been determined by means of the XRD studies, the Electrokinetic Sonic Analysis technique, and FESEM investigations of pressed Sr2FeMoO6-delta powders subjected to the isothermic treatment at 700 K and p(O-2) = 10 Pa. The temperature dependence of the electrical resistivity in the temperature range 4.2-300 K has a metallic type in the single-phase Sr2FeMoO6-delta compound and the semiconductor type in the Sr2FeMoO6-delta-SrMoO4-Sr2FeMoO6-delta structure with dielectric sheaths. In the latter case, a hopping mechanism of charge transfer is observed. In the applied magnetic field, the temperature dependence does not change qualitatively; however, the resistivity decreases with increasing field, i.e., a negative magnetoresistive effect appears, reaching 43.6% at 10 T and 10 K. The external field forms a collinear spin structure, thus increasing the spin-polarized current through the energy barriers in the granular Sr2FeMoO6-delta-SrMoO4-Sr2FeMoO6-delta heterostructure.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kalanda, NikolayUNSPECIFIEDorcid.org/0000-0001-7679-4968UNSPECIFIED
Yarmolich, MartaUNSPECIFIEDorcid.org/0000-0002-8005-2171UNSPECIFIED
Teichert, SteffenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bohmann, ArneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Petrov, AlexanderUNSPECIFIEDorcid.org/0000-0003-1208-5913UNSPECIFIED
Moog, DanielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mathur, SanjayUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-185830
DOI: 10.1007/s10853-018-2148-0
Journal or Publication Title: J. Mater. Sci.
Volume: 53
Number: 11
Page Range: S. 8347 - 8355
Date: 2018
Publisher: SPRINGER
Place of Publication: NEW YORK
ISSN: 1573-4803
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
LOW-FIELD MAGNETORESISTANCEMultiple languages
Materials Science, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/18583

Downloads

Downloads per month over past year

Altmetric

Export

Actions (login required)

View Item View Item