ESR Study of the Magnetic Properties of the CdTe/CdMnTe Multi Quantum Wells

The results of electron spin resonance investigations of bulk Cd$\text{}_{1-x}$Mn$\text{}_{x}$Te and of molecular beam epitaxy grown CdTe/CdMnTe single 2 μm thick layer and multi quantum well with Mn concentrations of about x = 0.10 are compared. The Mn$\text{}^{2+}$ electron spin resonance spectrum of the MQW CdTe/CdMnTe shows several features different from those observed in the CdMnTe bulk sample. The Mn$\text{}^{2+}$ resonance shows a small anisotropy of position and width with the anisotropy axis normal to the heterointerface. The temperature dependence of the width of the electron spin resonance line is also different from that observed for the bulk and for the thick single layer.