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Synthesis and magnetic properties of single phase titanomagnetites.

Authors :
Schoenthal, W.
Liu, X.
Cox, T.
Mesa, J. L.
Maicas, M.
Diaz-Michelena, M.
Laughlin, D. E.
McHenry, M. E.
Source :
Journal of Applied Physics; 2014, Vol. 115 Issue 17, p17A934-1-17A934-3, 3p
Publication Year :
2014

Abstract

The focus of this paper is the study of cation distributions and resulting magnetizations in titanomagnetites (TMs), (1-x)Fe<subscript>3</subscript>O<subscript>4-x</subscript>Fe<subscript>2</subscript>TiO<subscript>4</subscript> solid solutions. TM remnant states are hypothesized to contribute to planetary magnetic field anomalies. This work correlates experimental data with proposed models for the TM pseudobinary. Improved synthesis procedures are reported for single phase Ulvöspinel (Fe<subscript>2</subscript>TiO<subscript>4</subscript>), and TM solid solutions were made using solid state synthesis techniques. X-ray diffraction and scanning electron microscopy show samples to be single phase solid solutions. M-H curves of TM75, 80, 85, 90, and 95 (TMX where X=at.% of ulvöspinel) were measured using a Physical Property Measurement System at 10 K, in fields of 0 to 8 T. The saturation magnetization was found to be close to that predicted by the Neel model for cation distribution in TMs. M-T curves of the remnant magnetization were measured from 10K to 350 K. The remnant magnetization was acquired at 10K by applying an 8 T field and then releasing the field. Experimental Neel temperatures are reported for samples in the Neel model ground state. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00218979
Volume :
115
Issue :
17
Database :
Complementary Index
Journal :
Journal of Applied Physics
Publication Type :
Academic Journal
Accession number :
95982506
Full Text :
https://doi.org/10.1063/1.4866084