Room-temperature ferromagnetism in (Zn1-xMnx)GeP2 semiconductors.
We report on the discovery of a room-temperature ferromagnetic semiconductor in chalcopyrite (Zn1-xMnx)GeP2 with Tc = 312 K. We have also observed that, at temperatures below 47 K, samples for x = 0.056 and 0.2 show a transition to the antiferromagnetic (AFM) state, so that ferromagnetism is well defined to be present between 47 and 312 K. The observation that the AFM phase is most stable at low temperatures is consistent with the predictions of full-potential linearized augmented plane wave total energy calculations and has consequences for other chalcopyrite materials.
Cho
Sunglae
S
Department of Physics, University of Ulsan, Ulsan, 680-749, South Korea. slcho@mail.ulsan.ac.kr
Choi
Sungyoul
S
Cha
Gi-Beom
GB
Hong
Soon Cheol
SC
Kim
Yunki
Y
Zhao
Yu-Jun
YJ
Freeman
Arthur J
AJ
Ketterson
John B
JB
Kim
B J
BJ
Kim
Y C
YC
Choi
Byung-Chun
BC