Abstract
A series of single crystals based on CuCr 2Se 4 spinel diluted with Sb ions was prepared by chemical vapour transport. They were characterized by X-ray fluorescent spectroscopy (XRF), X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and bulk magnetization measurements. The results revealed that nonmagnetic Sb 3+ ions substitute Cr 3+ ions at the octahedral sites. For the Sb 3+ content x = 0.06 the single crystals of (Cu)[Cr 2− x Sb x ]Se 4 were formed, while for larger Sb concentration ( x = 0.12 and x = 0.16) the crystals with cation vacancies at the octahedral sites were obtained. The XPS data evidenced the 3 d 3 electronic configuration of Cr ions with localized magnetic moments for the three compositions differing in the Sb content. Despite the unaltered valence state of Cr ions along the series, the low-temperature magnetic characteristics have changed considerably. With increasing content of Sb the saturation magnetic moment was found to radically decrease. This effect may be explained in terms of the perturbation in the ferromagnetic Cr–Se–Cr indirect exchange interactions caused by the presence of increasing number of dopant atoms and vacancies in the crystal lattice.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
