Determination of the magnetic phase diagram in the H-T plane for a sigma-phase Fe47Mo53 alloy
arXiv:1902.03561 · doi:10.1016/j.jmmm.2019.03.089
Abstract
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 M_FC and M_ZFC curves yielded values of characteristic temperatures: magnetic ordering (Curie) temperature, T_C, irreversibility temperature, T_ir, temperature of the maximum in M_ZFC, T_m, identified as the Nėel (T_N) temperature, and cross-over temperature, T_co. 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.
arXiv comment15 pages, 11 figures, 17 references
References in corpus (7)
- Discovery and characterization of magnetism in sigma-phase intermetallic Fe-Re compounds
- Magnetic properties of -FeCr alloy as calculated with the charge and spin self-consistent KKR(CPA) method
- Magnetism of sigma-phase Fe-Mo alloys: its revealing and characterization
- Magnetism of sigma-phase Fe-Mo alloys: ac magnetic susceptibility study
- Theoretical study of magnetic properties and hyperfine interactions in -FeV alloys
- Detection of sub-lattice magnetism in sigma-phase Fe-V compounds by zero-field NMR
- The Debye temperature of sigma-phase Fe-Mo compounds as determined with Mössbauer spectroscopy