Magnetic properties of Dy³⁺ions and crystal field characterization in YF₃:Dy³⁺and DyF₃single crystals

Abstract

The dc magnetic susceptibilities of the orthorhombic DyF3 single crystals have been measured in the temperature range between 1.8 and 300 K. The susceptibility along the b-axis does not depend on temperature below TC = 2.55 K and is equal to the demagnetizing factor of the sample, that gives evidence for the ferromagnetic phase induced by the magnetic dipole–dipole interactions between the Dy3+ ions. The saturation moment of 8.5 μB/Dy3+ along the b-axis was determined from magnetization measurements. The observed strong anisotropy of the magnetic susceptibility at low temperatures agrees with the measured anisotropic g-tensor of the ground state of impurity Dy3+ ions in YF3 single crystals. The results of measurements are interpreted in the frameworks of the crystal field theory and the mean magnetic field approximation.

Physical properties of polycrystalline Dy2PdGe6 and La2PdGe6

“…Hence to attain the full Hund's rule value of R ln 16, one needs higher temperatures than RT. For the sake of comparison, we mention here that the total splitting energy of 6 H 15/2 multiplet of Dy 3+ in DyF 3 , crystallizing in the orthorhombic space group Pnma, is even as high as about 700 K [22]. Any more detailed treatment of such topics as above requires an adequate different kind of measurements made on single-crystalline samples.…”

Microwave-Assisted Hydrothermal Synthesis and Annealing of DyF3Nanoparticles

“…In addition, DyF 3 is an important component of oxyfluoride glasses [26]. On the other hand, there is a ferromagnetic phase transition in a single crystal at = 2.55 K [27]. Investigation of Curie temperature dependence versus the size of DyF 3 nanoparticles is a fundamental problem.…”

Size effect of DyF3 nanoparticles on Curie temperature

“…10,11 The wide range of properties of these compounds attracted interest to study their magnetic structure. Savinkov et al 12 published results of the study of a DyF 3 (dysprosium fluoride) single crystal by the measurement of the magnetization in weak external magnetic fields in a wide temperature range. A second order magnetic transition from the paramagnetic to the ferromagnetic state was observed.…”