Light scattering study on hybrid structures of Zn_1−x−yCd_xMn_ySe quantum wells with ferromagnetic Co wires

Abstract

Sub-micron scale hybrid structures of Zn 1-x-y Cd x Mn y Se diluted magnetic semiconductor (DMS) quantum wells (QWs) with ferromagnetic Co wires have been fabricated for the purpose of applying local magnetic fields to the DMS-QW. The wire of DMS-QW with the width down to 100 nm was sandwiched between the Co wires. The magneto-optical properties are studied by spin-flip light scattering of paramagnetic Mnions in the DMS. The application of uniform magnetic fields higher than 0.25 T has been attained from the Co wires to the DMS-QWs. In addition, the field application from the Co to the DMS-QWs is switched on by weak magnetic fields of 0.03 T due to the magnetic shape anisotropy of the Co wires, which can realize the switching behavior of the spin alignment of Mn-ions in the DMS-QW.

Preparation and Characterization of Zn-Se Bilayer Structure

“…Since last decade, there has been increased interest in ZnSe because this is a promising candidate for polymer nanocomposite semiconducting devices [5]. The ZnSe is used as cap and buffer layer in hybrid structure of magneto optical devices [6]. The rapid thermal annealing studies carried out by Singh et al [7] and suggested that variation of optical band gap within the range of ZnSe material, which may be due to compositional variation at interface of bilayer and increasing grain size of film with annealing time and R.B.S confirm the mixing of bilayer [7].…”