The single-crystalline Cr films with the body-centered-cubic (bcc) structure are obtained, with the epitaxial relationship of (0 0 1)[0 0 l]||Cr(0 0 1)[001] GaAs and (001)[100]Cr(001)[100]GaAs .

• 当生长温度低于70℃的时候，Cr以bcc(211) 面平行外延在GaAs(001) 面上，当生长温度超过130℃的时候，Cr以bcc(001) 面平行外延在GaAs(001) 面上。