Microstructure and magnetism of hydrothermal synthesized Mn-doped ZnTe nanoparticles

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机构：
[1] Tang, F.L.
[2] 1,Su, H.L.
[3] Huang, S.Y.
[4] Wu, Y.C.
[5] 3,Huang, J.C.A.
[6] Du, Y.W.
[7] Huang, X.L.
[8] Jin, Y.
来源：
Su, H.L. | 1600年 / Elsevier Ltd卷 / 617期
关键词：
Zinc-blende-structured Mn-doped ZnTe nanoparticles were obtained using a hydrothermal method. The particles exhibited coexisting ferromagnetism; paramagnetism and superparamagnetism. The ferromagnetism is maintained to near room temperature. Analysis of X-ray absorption spectra revealed that Mn ions; with a valence state close to 2+ and a local structural environment that was similar to that of Zn ion; substituted for Zn ions. The particles contained no Mn clusters or Mn oxides. These findings prove that the ferromagnetism of Mn-doped ZnTe is intrinsic. Bound magnetic polarons model based on Mn ions bound to defects is believed to be responsible for the ferromagnetism. The paramagnetism is attributed to isolated polarons or Mn ions. The superparamagnetism is likely to be associated with nanosized ferromagnetic particles. © 2014 Elsevier B.V. All rights reserved;
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