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Anomalous ferromagnetic resonance in manganese- and aluminum-doped germanium layers deposited from the laser plasma |
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| Authors: | Demidov E S Podol’skii V V Lesnikov V P Levchuk S A Gusev S N Karzanov V V Filatov D O |
| Institution: | 1.Nizhni Novgorod State University, pr. Gagarina 23, Nizhni Novgorod, 603950, Russia ;2.Research Physicotechnical Institute, Nizhni Novgorod State University, pr. Gagarina 23 korp. 3, Nizhni Novgorod, 603950, Russia ; |
| Abstract: | Ferromagnetic resonance (FMR) with an anomalous angular dependence has been observed in the Ge:(Mn, Al)/GaAs nanolayers deposited from laser plasma at a reduced temperature of 150°C. The resonance is associated with the needle-like inclusions of a high-temperature ferromagnetic phase with the Curie temperature T C > 293 K. Such a magnetic anisotropy is confirmed by the atomicforce and magneticforce microscopy of a side chip. A low-temperature ferromagnetic phase with normal FMR and T C < 212 K is formed between the needle-like inclusions. This phase manifests itself in the anomalous Hall effect at 77 K and probably is a solid solution of manganese in germanium. |
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