Volume 114, Number 5, June 2016
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||08 July 2016|
La(Zn1−2xMnxCux)AsO: A 1111-type diluted magnetic semiconductor with manganese and copper codoping at Zn sites
1 Department of Physics, Zhejiang University - Hangzhou 310027, China
2 Collaborative Innovation Center of Advanced Microstructures - Nanjing 210093, China
3 Department of Physics, Hangzhou Normal University - Hangzhou 310016, China
Received: 6 March 2016
Accepted: 19 June 2016
We report the successful synthesis and characterization of a new layered diluted magnetic semiconductor (DMS) La(Zn,Mn,Cu)AsO which is isostructural to Fe-based “1111” superconductor. Mn and Cu are codoped into the same Zn sites to provide local moments and carriers, respectively. A ferromagnetic transition with the highest TC of ∼ 8 K has been observed for from magnetization measurements. Iso-thermal magnetization plots show that the compound has a coercive field, ∼ 500 Oe, much smaller than that in (La,Ba)(Zn,Mn)AsO. The resistivity of all samples display semiconducting behavior with the doping level up to 15%.
PACS: 75.50.Pp – Magnetic semiconductors / 75.50.Lk – Spin glasses and other random magnets / 75.30.Cr – Saturation moments and magnetic susceptibilities
© EPLA, 2016
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