Anomalous Anisotropic Magnetoresistance And Magnetization In Mn3.69Bi95.69Fe0.62
| Autor: | A. V. Terekhov, A. L. Solovjov, A. I. Prokhvatilov, V. V. Meleshko, I. V. Zolochevskii, J. Cwik, A. Los, A. D. Shevchenko, O. M. Ivasishin, Z. D. Kovalyuk |
|---|---|
| Jazyk: | English<br />Russian<br />Ukrainian |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | East European Journal of Physics, Vol 4, Iss 4, Pp 12-17 (2017) |
| Druh dokumentu: | article |
| ISSN: | 2312-4334 2312-4539 |
| Popis: | It was found that the Mn3.69Bi95.69Fe0.62 consists of two phases, namely of a bismuth matrix and BiMn inclusions. It is shown that the samples have a crystalline texture. Independently on the applied field orientation, maximum on the temperature dependence of magnetization is detected at Tmax ≈ 85 K, which is associated with the reorientation transition of the magnetic moments of Mn for αBiMn phase. In turn, the electrical resistivity ρ(T) also demonstrates maximum at Tmax ≈58 K in a magnetic field of 800 kA/m when H⊥I. It is established that the maximum of ρ(T) increases and is shifted toward higher temperature Tmax≈94 K when field increasing up to 2400 kA/m. At the same time no clear maximum on ρ(T) is observed for H||I. It is shown that the relative magnetoresistance, Δρ/ρ0, is increased both with decreasing temperature and with increase of the magnetic field. The measured enhancement reaches Δρ/ρ0≈250% for H||I and Δρ/ρ0≈2400% for H⊥I in magnetic field of 2400 kA/m. Thus, the strong anisotropy of ρ(T) and Δρ/ρ0(T) is established both for H⊥I and H||I. Possible explanation of observed anomalous behavior of the temperature dependences of the electrical resistivity in magnetic fields has been proposed. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|