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Effect of electron-beam irradiation on the magnetic properties of Ga_(1-x)Mn_xAs thin films grown on GaAs (100) substrates

机译:电子束辐照对在GaAs(100)衬底上生长的Ga_(1-x)Mn_xAs薄膜的磁性的影响

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摘要

The effect of electron-beam irradiation on the magnetic properties of (Gai_(1-x)Mn_x)As thin films grown on GaAs (100) substrates by using molecular beam epitaxy was investigated. The ferromagnetic transition temperature (T_c) of the annealed (Ga_(0.933)Mn_(0.067))As thin films was 160 K. The T_c value for the as-grown (Ga_(0.933)Mn_(0.067))As thin films drastically decreased with increasing electron-beam current. This significant decrease in the T_c value due to electron-beam irradiation originated from the transformation of Mn substituted atoms, which contributed to the ferromagnetism, into Mn interstitials or Mn-related clusters. These results indicate that the magnetic properties of (Ga_(1-x)Mn_xAs thin films grown on GaAs (100) substrates are significantly affected by electron-beam irradiation.
机译:利用分子束外延研究了电子束辐照对在GaAs(100)衬底上生长的(Gai_(1-x)Mn_x)As薄膜磁性的影响。退火的(Ga_(0.933)Mn_(0.067))As薄膜的铁磁转变温度(T_c)为160 K.生长的(Ga_(0.933)Mn_(0.067))As薄膜的T_c值急剧下降随着电子束电流的增加。由于电子束辐照引起的T_c值的显着下降,这是由于Mn取代原子转变成Mn间隙或Mn相关簇而引起的,该取代原子有助于铁磁性。这些结果表明,生长在GaAs(100)衬底上的(Ga_(1-x)Mn_xAs薄膜的磁性受到电子束辐射的显着影响。

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