摘要
We report the ferromagnetism with Cure temperature Tcat 230 K in a new diluted magnetic semiconductor(DMS)(Ba0.7K0.3)(Zn0.85Mn0.15)2As2isostructural to ferropnictide 122 superconductors synthesized via low temperature sintering.Spin is doped by isovalence substitution of Mn2+for Zn2+,while charge is introduced by heterovalence substitution of K1+for Ba2+in(Ba0.7K0.3)(Zn0.85Mn0.15)2As2DMS,being different from(Ga,Mn)As where both spin&charge are induced simultaneously by heterovalence substation of Mn2+for Ga3+.The(Ba0.7K0.3)(Zn0.85Mn0.15)2As2DMS shows spontaneous magnetization following T3/2dependence expected for a homogeneous ferromagnet with saturation moment 1.0μB for each Mn atom.
We report the ferromagnetism with Cure tem- perature Tc at 230 K in a new diluted magnetic semiconductor （DMS） （Ba0.7K0.3）（Zn0.85Mn0.15）2As2 isostructural to ferropnictide 122 superconductors synthesized via low temperature sintering. Spin is doped by isovalence substitution of Mn2＋for Zn2＋, while charge is introduced by heterovalence substitution of Kl＋ for Ba2＋ in （Ba0.7K0.3）（Zn0.85Mn0.15）2As2 DMS, being different from （Ga,Mn）As where both spin ＆ charge are induced simultaneously by heterovalence substation of Mn2＋ for Ga3＋. The （Ba0.7K0.3）（Zn0.85Mn0.15）2As2 DMS shows spontaneous magnetization following T3/2 dependence expected for a homogeneous ferromagnet with saturation moment 1.0μB for each Mn atom
基金
supported by the National Natural Science Foundation of China
the Ministry of Science and Technology (MOST) of China
