| Summary: | 碩士 === 國立成功大學 === 物理學系碩博士班 === 91 === The molecular beam epitaxy (MBE) growth fcc(111) oriented Ni80Fe20/Ir/ Ni80Fe20 trilayers were prepared to study the interlayer exchange coupling. We found that Ni80Fe20/Ir (tIr Å)/ Ni80Fe20 (tIr = 5~40) sandwich exhibit anomalous oscillatory exchange coupling strength. The antiferromagnetic (AF) peaks appear at tIr =7, 19, 28, 40 Å, and the maxima AF coupling strength is about 2.32 erg/cm2 with tIr =7 Å, however, the oscillation period is not the same, may course by the superposition of the spanning vector of the complicated Ir(111) Fermi surface.
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