Critical behavior of the 3D-Ising ferromagnets Cd[CrxTiy]Se4

• Published in: The Journal of physics and chemistry of solids Vol. 74; no. 10; pp. 1419 - 1425
• Main Authors: Rduch, P., Duda, H., Guzik, A., Malicka, E., Groń, T., Mazur, S., Gągor, A., Sitko, R.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2013
• Subjects: A. Chalcogenides; B. Crystal growth; Curie temperature; D. Critical phenomena; Ferromagnetism; Magnetic permeability; Magnetic susceptibility; Mathematical analysis; Saturation (magnetic); Three dimensional; Titanium; D. Critical phenomena; B. Crystal growth; A. Chalcogenides
• ISSN: 0022-3697; 1879-2553
• DOI: 10.1016/j.jpcs.2013.04.026

The critical behavior of the single-crystalline Cd[CrxTiy]Se4 spinels (where y=0.07, 0.42 and 0.59) investigated around the paramagnetic–ferromagnetic phase transition revealed the values of the critical exponents close to those predicted by the calculations for a three-dimensional (3D) anisotropic short-range Ising ferromagnet. The dc magnetic susceptibility and magnetization measurements showed the Curie temperature of 130K and the saturation magnetization above 5.19μB/f.u. slightly depend on the Ti content. An increase of the positive value of the temperature independent magnetic susceptibility as the Ti-content increases suggests a significant Van Vleck contribution. [Display omitted] •The critical exponents suggest a 3D-Ising model.•The larger Ti-content, the larger Van Vleck contribution.•Ti-substitution reveals a change of ferromagnetic interactions from isotropic to anisotropic ones.