Electronic and magnetic properties of diluted magnetic semiconductors A_{1– x}Mn_xTe (A = Cd, Zn) (0 ≤ x ≤ 1)

Abstract

We have investigated the magnetic and electronic properties of diluted magnetic semiconductors (DMS) Cd 1-x Mn x Te and Zn 1-x Mn x Te. The magnetic phase diagrams have been determined by the replica method in the framework of the Ising model using the variational principle. The obtained results are in agreement with the experimental ones. A spin glass state has been obtained for x < x c (x c = 0.6). This phase is attributed to the randomness and the frustration of the antiferromagnetic interactions between the Mn magnetic ions arising from the topology of the DMS alloys. The sp 3 semi-empirical nearest-neighbour tight-binding formalism is used to compute the band structures of the above two systems in the hole range of concentration 0 ≤ x ≤ 1. The variation of the gap energy E g with x is presented. The magnetic blueshift for x > x c is discussed in relation with the published magnetic results.

Theoretical study of magnetic properties of SrMn1‐xFexO3 perovskites

“…We can see the good agreement between the magnetic phase diagrams obtained by the HTSE method and the experimental ones, in particular in the case of the last systems of which the phase diagrams have been established well by different methods (Alba et al, 1982;Afif et al, 2000). The results given by the HTSE method are comparable with the obtained results given by the replica method (Hamedoun et al, 2003).…”

Optical and magnetic characteristics of BaTi1-xCoxO3: A first-principles study

“…The electronic features including the density of states (DOS) and band structure (BS) of Ba 1-x Co x TiO 3 (x= 8.33%, 16.66%, 25%, and 50%) compounds have been studied by employing GGA method as shown in Fig. (2)(3)(4)(5). The pure BTO has a E g of 1.83 eV [25].…”

“…In this context, spintronics is in limelight due to the usage of both the spin and charge of electrons to improve the information density. Dilute magnetic semiconductors (DMS) have been probed extensively owning to semiconducting and magnetic features and their need in spintronic and rotating electronic devices [1][2][3]. In modern research, there are various methods to fabricate DMSs by doping various elements, particularly ferromagnetic elements like Fe, Mn, V, Co, Cr, and Ni into non-ferromagnetic semiconductors [3][4][5].…”

“…Dilute magnetic semiconductors (DMS) have been probed extensively owning to semiconducting and magnetic features and their need in spintronic and rotating electronic devices [1][2][3]. In modern research, there are various methods to fabricate DMSs by doping various elements, particularly ferromagnetic elements like Fe, Mn, V, Co, Cr, and Ni into non-ferromagnetic semiconductors [3][4][5]. Various materials like metal oxides, alloys, and perovskites demonstrate the DMSs behavior.…”