High-temperature magnetism and microstructure of a semiconducting ferromagnetic (GaSb) 1- x (MnSb) x alloy

We have studied the properties of relatively thick (about 120 nm) magnetic composite films grown by pulsed laser deposition using the eutectic compound (GaSb) (MnSb) as target for sputtering. For the studied films we have observed ferromagnetism and an anomalous Hall effect above room temperature, c...

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Bibliographic Details
Published in:Beilstein journal of nanotechnology 2018, Vol.9 (1), p.2457-2465
Main Authors: Oveshnikov, Leonid N, Nekhaeva, Elena I, Kochura, Alexey V, Davydov, Alexander B, Shakhov, Mikhail A, Marenkin, Sergey F, Novodvorskii, Oleg A, Kuzmenko, Alexander P, Vasiliev, Alexander L, Aronzon, Boris A, Lahderanta, Erkki
Format: Article
Language:English
Subjects:
Alloys
anomalous Hall effect
Columnar structure
Current carriers
Electron spin
Ferromagnetic materials
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Gallium antimonides
Hall effect
high-temperature ferromagnetism
Inclusions
Lasers
Magnetic fields
Magnetic properties
Magnetism
Microscopy
Nanoscience
nanostructured materials
Nanotechnology
Phase transitions
Pulsed laser deposition
Pulsed lasers
Semiconductors
Software
thin films
Transport properties
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Summary:We have studied the properties of relatively thick (about 120 nm) magnetic composite films grown by pulsed laser deposition using the eutectic compound (GaSb) (MnSb) as target for sputtering. For the studied films we have observed ferromagnetism and an anomalous Hall effect above room temperature, confirming the presence of spin-polarized carriers. Electron microscopy, atomic and magnetic force microscopy results suggest that the films under study have a homogenous columnar structure in the bulk while MnSb inclusions accumulate near the surface. This is in good agreement with the high mobility values of charge carriers. Based on our data we conclude that the magnetic and magnetotransport properties of the films at room temperature are defined by the MnSb inclusions.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.9.230