Determination of the magnetic phase diagram in the H-T plane for a sigma-phase Fe47Mo53 alloy: Double re-entrant transition
| Autor: | Israel Felner, Maria Bałanda, Stanisław M. Dubiel |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Field (physics) Condensed matter physics Plane (geometry) Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Power law Electronic Optical and Magnetic Materials Magnetic field Magnetization Phase (matter) 0103 physical sciences Exponent engineering 0210 nano-technology |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 483:65-69 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2019.03.089 |
| Popis: | Magnetization measurements were carried out in the in field-cooled (FC) and in zero-field-cooled (ZFC) conditions versus temperature, T, and external magnetic field, H, on a sigma-phase Fe47Mo53 compound. Analysis of the measured MFC and MZFC curves yielded values of characteristic temperatures: magnetic ordering (Curie) temperature, TC, irreversibility temperature, Tir, temperature of the maximum in MZFC, Tm, identified as the Nėel (TN) temperature, and cross-over temperature, Tco. Based on these temperatures a magnetic phase diagram in the H-T plane was outlined. The field dependences of the characteristic temperatures viz. of the irreversibility and of the cross-over temperatures were described in terms of a power law with the exponent 0.5(1). In the whole range of H i.e. up to 800 Oe, except the one H ≤ 50 Oe, a rare double re-entrant transition viz. PM → FM → AF → SG takes place. For small fields i.e. H ≤ 50 Oe a single re-entrant transition viz. PM → FM → SG is revealed. |
| Databáze: | OpenAIRE |
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