Sr and Mn co-doped LaCuSO: A wide band gap oxide diluted magnetic semiconductor with TC around 200 K

Abstract

Here we report the synthesis of a bulk oxide diluted magnetic semiconductor (DMS) system La 1−x Sr x Cu 0.925 Mn 0.075 SO (x = 0, 0.025, 0.05, 0.075 and 0.1). As a wide band gap p-type oxide semiconductor, LaCuSO satisfies all the conditions forecasted theoretically to be a room temperature DMS. The Curie temperature (T C ) is around 200 K as x ≥ 0.05, which is among the highest T C record of known bulk DMS materials up to now. The system provides a rare example of oxide DMS system with p-type conduction, which is important for formation of high temperature spintronic devices.

K and Mn co-doped BaCd2As2: A hexagonal structured bulk diluted magnetic semiconductor with large magnetoresistance

“…The system features high manganese solubility up to x $ 0.4, which is not only higher than traditional III-V DMS, 2 but also higher than the newly discovered bulk DMS based on "111" LiZnAs, 10 "122" BaZn 2 As 2 , 11 and "1111" LaZnAsO and LaCuSO systems. 20,21 Large negative magnetoresistance (À70%) and small coercive field (less than 10 Oe) were observed in this system. Its hexagonal structure and small coercive field enable its applications in spintronics and other functional junction devices in combination with topological insulators or superconductors.…”

Sr 0.9 K 0.1 Zn 1.8 Mn 0.2 As 2 : A ferromagnetic semiconductor with colossal magnetoresistance

“…Actually, only in a limited number of DMS systems the concentration of acceptor and Mn impurity (i.e., magnetic moment) can be tuned independently [9][10][11] . Inspired by the rapid developement of iron-based superconductors [12][13][14] , a series of DMS systems based on the similar layered structure were found 7,[15][16][17] .…”

New Fluoride-arsenide Diluted Magnetic Semiconductor (Ba,K)F(Zn,Mn)As with Independent Spin and Charge Doping

“…Shortly after, another new type of bulk ferromagnetic DMS (Ba,K)(Zn,Mn) 2 As 2 was synthesized with much higher T C up to 230 K1617. More recently, several types of bulk DMSs with decoupled spin & charge doping have been successfully fabricated, including Li(Zn,Mn)P18, (La,Ca)(Zn,Mn)SbO19, (La,Ba)(Zn,Mn)AsO20, (La,Sr)(Cu,Mn)SO21, (Sr,Na)(Cd,Mn) 2 As 2 22, and ( A ,Na)(Zn,Mn) 2 As 2 ( A  = Ca, Sr,)2324.…”