The preparation and antiferromagnetic properties of epitaxial rocksalt-type CoN films

• Published in: Journal of alloys and compounds Vol. 582; pp. 75 - 78
• Main Authors: Liu, Xiangbo, Lu, Huibin, He, Meng, Jin, Kuijuan, Yang, Guozhen, Ni, Hao, Zhao, Kun
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 2014; Elsevier
• Subjects: Ablation; Alloys; Antiferromagnetism; Antiferromagnteic property; Cobalt nitrides; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Diffraction; Epitaxial growth; Exact sciences and technology; Magnetic properties; Magnetic properties and materials; Magnetic properties of monolayers and thin films; Magnetic properties of surface, thin films and multilayers; Mechanical and acoustical properties; Physical properties of thin films, nonelectronic; Physics; Strontium titanates; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); X-rays; Antiferromagnteic property; Cobalt nitrides; Epitaxial growth; Antiferromagnetism; Magnetization; Epitaxy; XRD; Thin films; Transmission electron microscopy; Temperature effects; Strontium titanates; Microstructure; Cobalt nitride
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.08.001

•Rocksalt-type CoN films were grown on SrTiO3 and sapphire substrates by Laser-MBE.•CoN grows in [100] direction on SrTiO3(100) substrate.•CoN grows in [111] direction on α-Al2O3(0001) substrate.•RS-type CoN shows a paramagnetism-to-antiferromagnetism transition at ∼310K. We have grown epitaxial rocksalt-type CoN films on SrTiO3 and sapphire substrates by ablating a cobalt target in activated nitrogen atmosphere. The structural and magnetic properties have been investigated. X-ray diffraction profiles show CoN films grow along the [100] and [111] direction on SrTiO3(100) and α-Al2O3(0001), respectively. High-resolution transmission electron microscopy measurement has been performed on CoN/SrTiO3 system, which shows a good epitaxial growth. Temperature-dependent magnetization curves reveal that the as-grown films have antiferromagnetic properties with TN of ∼310K.