Brahmam K Veera, Reddy D Raja, Reddy B K
Department of Physics, Sri Venkateswara University, Tirupati, 517502, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2004 Mar;60(4):741-5. doi: 10.1016/S1386-1425(03)00270-1.
Single crystals of Zn1-xMnxTe for x = 0.1, 0.25, 0.45, 0.5 and 0.6 were prepared using vertical Bridgman technique. EPR (electron paramagnetic resonance) spectra were recorded at room temperature (303 K) between 0 and 6 kG magnetic field and range of frequency 8.8-9.6 GHz. As the concentration of Mn increases the line width (DeltaH) and the number of spins (Ns) were increased. Susceptibility studies were carried out at room temperature in the range of dc magnetic field 0-10 kG using vibrating sample magnetometer (VSM). Non-linear variation in susceptibility as a function of concentration (x) was observed and was explained on the basis of sp-d and d-d exchange interactions between Mn2+ ions and ZnTe lattice ions. Both EPR and susceptibility studies confirm the paramagnetic state of Zn1-xMnxTe system at RT.
采用垂直布里奇曼技术制备了x = 0.1、0.25、0.45、0.5和0.6的Zn1-xMnxTe单晶。在室温（303 K）下，于0至6 kG的磁场以及8.8 - 9.6 GHz的频率范围内记录电子顺磁共振（EPR）光谱。随着锰浓度的增加，线宽（ΔH）和自旋数（Ns）增加。使用振动样品磁强计（VSM）在室温下于0至10 kG的直流磁场范围内进行了磁化率研究。观察到磁化率随浓度（x）的非线性变化，并基于Mn2+离子与ZnTe晶格离子之间的sp-d和d-d交换相互作用对此进行了解释。EPR和磁化率研究均证实了Zn1-xMnxTe体系在室温下的顺磁状态。
