Search

Your search keyword '"Guo, Shengli"' showing total 14 results
Start Over Author "Guo, Shengli" Publisher iop publishing
14 results on '"Guo, Shengli"'

5. A novel diluted magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2 with decoupled charge and spin dopings.

Author

Gu, Yilun, Zhang, Haojie, Zhang, Rufei, Fu, Licheng, Wang, Kai, Zhi, Guoxiang, Guo, Shengli, and Ning, Fanlong

Subjects
DILUTED magnetic semiconductors, IRON-based superconductors, CALCIUM compounds, MAGNETORESISTANCE, CRYSTAL structure
Abstract

We report the successful synthesis of a new diluted magnetic semiconductor (Ca,Na)(Zn,Mn)2Sb2. Na and Mn are doped into the parent compound CaZn2Sb2, which has the same crystal structure as that of "122" type iron-based superconductor CaFe2As2. Na substitution for Ca and Mn substitution for Zn introduce carriers and spins, respectively. Doping Mn atoms alone up to 5% does not induce any type of magnetic ordering. When both Na and Mn are co-doped, a ferromagnetic ordering with maximum TC ∼ 10 K has been observed. Iso-thermal magnetization shows that the coercive field is up to ∼ 245 Oe at 2 K. Below TC, a negative magneto-resistance with MR ∼ 12% has also been achieved. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

9. The synthesis and characterization of 1 1 1 1 type diluted ferromagnetic semiconductor (La1−xCax)(Zn1−xMnx)AsO

Author

Ding, Cui, primary, Guo, Shengli, additional, Zhao, Yao, additional, Man, Huiyuan, additional, Fu, Licheng, additional, Gu, Yilun, additional, Wang, Zhouyang, additional, Liu, L, additional, Frandsen, B A, additional, Cheung, S, additional, Uemura, Y J, additional, Goko, T, additional, Luetkens, H, additional, Morenzoni, E, additional, Zhao, Yang, additional, and Ning, F L, additional

Published
2015
Full Text
View/download PDF

14. The synthesis and characterization of 1111-type diluted magnetic semiconductors (La1−xSrx)(Zn1−xTMx)AsO (TM = Mn, Fe, Co).

Author

Lu, Jicai, Man, Huiyuan, Ding, Cui, Wang, Quan, Yu, Biqiong, Guo, Shengli, Wang, Hangdong, Chen, Bin, Han, Wei, Jin, Changqing, Uemura, Yasutomo J., and Ning, Fanlong

Abstract

The doping effect of Sr and transition metals Mn, Fe, Co into the direct-gap semiconductor LaZnAsO has been investigated. Our results indicate that the single phase ZrCuSiAs-type tetragonal crystal structure is preserved in (La1−xSrx)(Zn1−xTMx)AsO (TM = Mn, Fe, Co) with the doping level up to . While the system remains semiconducting, doping with Sr and Mn results in ferromagnetic order with , and doping with Sr and Fe results in a spin-glass–like state below with a saturation moment of ∼0.02 μB/Fe, an order of magnitude smaller than the ∼0.4 μB/Mn of Sr- and Mn-doped samples. The same type of magnetic state is observed neither for (Zn,Fe) substitution without carrier doping, nor for Sr- and Co-doped specimens. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results