Magnetic Critical Behavior, Hall and Magneto-Impedance Effects in Fe–Co-Based Metallic Glasses
| Autor: | Jessica Lopez-Tabares, Abilo A. Velasquez-Salazar, F.D. Saccone, Nicolas A. Salazar-Henao, Diego F. Gomez-Montoya, A. Rosales-Rivera, Rafael F. Gonzalez-Sanchez |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Condensed matter physics Heisenberg model Exchange interaction Classical XY model 01 natural sciences Electronic Optical and Magnetic Materials Dipole Magnetization Magnetic anisotropy Hall effect 0103 physical sciences Electrical and Electronic Engineering Critical exponent |
| Zdroj: | IEEE Transactions on Magnetics. 57:1-6 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2020.3013294 |
| Popis: | A comparative study of the magnetic critical behavior, magnetic anisotropy, Hall and magneto-impedance effects, and magnetic interactions is presented for Fe70Nb10B20 and Co70Nb10B20 metallic glasses. The critical behavior is studied by determining the critical exponents for zero-field magnetization ( $\beta$ ), critical isotherm ( $\delta$ ), and critical temperature $T_{\mathrm {C}}$ , from magnetization measurements using the method by Berger-Campillo et al. The corresponding ( $\beta $ , $\delta $ , and $T_{\mathrm {C}}$ ) values for Fe70Nb10B20 and Co70Nb10B20 are (0.341 ± 0.008, 4.00 ± 0.27, and 644.5 ± 25.5 K) and (0.399 ± 0.014, 4.25 ± 0.44, and 460 ± 32 K), respectively. These $\beta $ values indicate that the universality class of Fe70Nb10B20 is consistent with the 3-D XY model, whereas Co70Nb10B20 seems to be more close to the 3-D Heisenberg model. These $T_{\mathrm {C}}$ values indicate that the exchange interaction is weaker in Co70Nb10B20 than in Fe70Nb10B20. The Hall effect experiments reveal an ordinary and extraordinary contribution to the Hall effect and a positive Hall constant. Furthermore, the extraordinary Hall contribution and magnetic anisotropy decrease more rapidly in Co70Nb10B20 than in Fe70Nb10B20. The magneto-impedance curves exhibit the single-peak (SP) and two-peak (TP) behaviors. The possible magnetic interactions, including the spin–orbit interaction, the exchange interaction, and the magnetic dipolar interaction, might be active in these materials, and their possible effects on the $\beta $ value are analyzed. |
| Databáze: | OpenAIRE |
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