Synthesis and characterization of magnetic (Cr0.5Mn0.5)2GaC thin films

Growth of (Cr 0.5 Mn 0.5 ) 2 GaC thin films from C, Ga, and compound Cr 0.5 Mn 0.5 targets is reported for depositions on MgO (111), 4H-SiC (0001), and Al 2 O 3 (0001) with and without a NbN (111) seed layer. Structural quality is found to be highly dependent on the choice of substrate with MgO (111...

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Bibliographic Details
Published in:Journal of materials science 2015-07, Vol.50 (13), p.4495-4502
Main Authors: Petruhins, Andrejs, Ingason, Arni Sigurdur, Lu, Jun, Magnus, Fridrik, Olafsson, Sveinn, Rosen, Johanna
Format: Article
Language:English
Subjects:
Aluminum oxide
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Classical Mechanics
Crystallography and Scattering Methods
Ferromagnetism
Magnesium oxide
Magnetic measurement
Magnetic moments
Materials Science
Niobium nitride
Original Paper
Polymer Sciences
Solid Mechanics
Substrates
Temperature dependence
Thin films
Transmission electron microscopy
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Summary:Growth of (Cr 0.5 Mn 0.5 ) 2 GaC thin films from C, Ga, and compound Cr 0.5 Mn 0.5 targets is reported for depositions on MgO (111), 4H-SiC (0001), and Al 2 O 3 (0001) with and without a NbN (111) seed layer. Structural quality is found to be highly dependent on the choice of substrate with MgO (111) giving the best results as confirmed by X-ray diffraction and transmission electron microscopy. Phase pure, high crystal quality MAX phase thin films are realized, with a Cr:Mn ratio of 1:1. Vibrating sample magnetometry shows a ferromagnetic component from 30 K up to 300 K, with a measured net magnetic moment of 0.67 μ B per metal (Cr + Mn) atom at 30 K and 5 T. The temperature dependence of the magnetic response suggests competing magnetic interactions with a resulting non-collinear magnetic ordering.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-015-8999-8