Features of magnetoresistance and magnetic properties in Bi95.69Mn3.69Fe0.62
A study of textured, polycrystalline Bi95.69Mn3.69Fe0.62 containing two phases: the bismuth matrix and inclusions of the α-BiMn phase. It is shown that the anomalous behavior of the magnetization temperature dependences can be linked to the reorientation transition of the Mn magnetic moments in the...
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Veröffentlicht in: | Low temperature physics (Woodbury, N.Y.) N.Y.), 2018-11, Vol.44 (11), p.1153-1160 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A study of textured, polycrystalline Bi95.69Mn3.69Fe0.62 containing two phases: the bismuth matrix and inclusions of the α-BiMn phase. It is shown that the anomalous behavior of the magnetization temperature dependences can be linked to the reorientation transition of the Mn magnetic moments in the α-BiMn phase, caused by the change in the sign of the magnetic anisotropy constant. It is established that the temperature dependences of the electrical resistivity in a magnetic field are non-monotonic, and that the magnetoresistance is positive in all temperature ranges, reaching a maximum value of 3033% for a magnetic field of 140 kOe, when the magnetic field is perpendicular to the transport current. A strong anisotropy of electrical resistivity is measured in a magnetic field. It is assumed that the anomalous behavior of the electrical resistivity as a function of temperature in Bi95.69Mn3.69Fe0.62, as compared to pure bismuth, is linked to a change in the overlap between the electron and the hole Fermi surfaces under the influence of α-BiMn phase magnetism, as well as the magnitude and direction of the external magnetic field. |
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ISSN: | 1063-777X 1090-6517 |
DOI: | 10.1063/1.5060969 |