¹National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”
37, Beresteiskyi Avenue, 03056 Kyiv, Ukraine
²Technical Center NAS of Ukraine, 13, Pokrovs’ka str., 04070 Kyiv, Ukraine
³O. Usikov Institute for Radiophysics and Electronics, NAS of Ukraine, 12, Proskura str., 61085 Kharkiv, Ukraine
⁴V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 41, prospect Nauky, 03028 Kyiv, Ukraine
*Corresponding author e-mail: dariyasavchenko@gmail.com

Abstract. We report the first study of Zn1−xMnxSe:Fe2+,Cr2+ (x = 0.3) crystals by continuous wave (CW) and pulsed electron paramagnetic resonance (EPR) spectroscopic techniques. Using the advantages of pulsed EPR, spin Hamiltonian parameters for Mn2+ ions were obtained (g∥ = g⊥ = 2.0060(3), А∥ = А⊥ = 61.84·10–4 cm–1, and D = –7.1·10–4 cm–1). The temperature dependence of the spin relaxation times of Mn2+ ions was described using the Orbach process for TM–1 and the Raman mechanisms for T1–1. The spin Hamiltonian parameters for Cr2+ ions were determined from the analysis of the angular dependence of CW EPR spectra (g⊥ = 1.98, g∥ = 1.961, D = –2.48 cm–1, and a = 0.02 cm–1). Moreover, an anisotropic ferromagnetic resonance (FMR) line was observed, the nature of which has yet to be clarified.

Keywords:EPR, transition metals, zinc selenide.

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