ESR study on Cr3+ and Mn2+ doped ZnAl2S4 single crystal
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Термодинамика. Энергетика (15)
Измерение количества тепла. Калориметрия (3)
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AKTAŞ, Bekir, GUNER, Selahaddin, YILDIZ, Fikret, NATEPROV, Alexander, SIMINEL, Anatolii, KULYUK, Leonid. ESR study on Cr3+ and Mn2+ doped ZnAl2S4 single crystal. In: Journal of Magnetism and Magnetic Materials, 2003, vol. 258-259, pp. 409-412. ISSN 0304-8853. DOI: https://doi.org/10.1016/S0304-8853(02)01073-9
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Journal of Magnetism and Magnetic Materials
Volumul 258-259 / 2003 / ISSN 0304-8853

ESR study on Cr3+ and Mn2+ doped ZnAl2S4 single crystal

DOI:https://doi.org/10.1016/S0304-8853(02)01073-9
CZU: 536.76:536.631

Pag. 409-412

Aktaş Bekir1, Guner Selahaddin2, Yildiz Fikret1, Nateprov Alexander3, Siminel Anatolii3, Kulyuk Leonid3
 
1 Gebze Institute of Technology,
2 Fatih University, İstanbul,
3 Institute of Applied Physics, Academy of Sciences of Moldova
 
 
Disponibil în IBN: 15 februarie 2024


Rezumat

The spinel ZnAl2S4 compound has been studied by electron spin resonance (ESR) technique. Paramagnetic Cr3+ and Mn2+ ions have been substituted for Al3+ and Zn2+ ions to investigate crystalline field symmetry and electronic structure as a function of the temperature between 10 and 300 K. Computer analysis of the ESR data indicated a high homogeneity and quality for the crystal. The magnetic electrons of Cr3+ ion are highly localized (98.6%) on Cr3+, while the unpaired electrons of Mn2+ are significantly delocalized (about 20%) to get covalent bonding with neighboring atoms (possibly Zn, S, Al). The ZnAl2S4 crystal is shown to be in the normal spinel structure without any significant distortion detectable even by a very high sensitive technique like ESR. The temperature does not affect these localization properties of the electrons either, indicating strong stability of the crystal symmetry. 

Cuvinte-cheie
ESR (electron spin resonance), Spinel