Electron Paramagnetic Resonance of Cr3+ Ions in Single Crystals of Yttrium Aluminum Borate YAl3(BO3)4

Abstract

Single crystal of yttrium aluminum borate YAl₃(BO₃)₄ doped with chromium ions (1 at %) was studied using electron paramagnetic resonance spectroscopy. It is shown that chromium ions introduced into the sample occupy yttrium ion sites in the crystal structure. The parameters of the spin Hamiltonian of Cr³⁺ ions in the YАl₃(ВО₃)₄ matrix are determined at different temperatures. The sign of the fine structure parameter D allows the conclusion that the chromium ions in YА1₃(ВО₃)₄ single crystals have an easy-plane anisotropy.