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Magnetic and Magneto-Optical Properties of Sputter-Deposited and Annealed Co-Pt Alloys

  • Sung-Eon Park (a1), Pu-Young Jung (a1), Ki-Bum Kim (a1), Seh-Kwang Lee (a2) and Soon-Gwang Kim (a2)...

Abstract

We have produced Co1-xPtX (X = 0.53 and 0.75) alloy films using DC magnetron sputtering and investigated their magnetic properties using vibrating sample magnetometry(VSM) and Kerr hysteresis loop tracer. The as-deposited Co-Pt alloy films show a strong in-plane magnetization. By annealing the alloy samples, we have identified that the magnetic properties are drastically changed. While the magnetic properties of the Co0 25Pt0 75 alloy films show no noticeable changes, the coercivity and the squareness of the Co0.47Pt0.53 alloy films are drastically increased after annealing. Transmission electron microscopy(TEM) and x-ray diffractometry(XRD) analysis showed that CoPt(L10) and Co-Pt3 (L12) ordered phases, respectively, are formed in each case with a strong (11) texture. We suggest that the perpendicular magnetic anisotropy in the Co-Pt system does not depend on the mere textureness of the layer but strongly depends on the arrangement of Co and Pt at an atomic scale.

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Magnetic and Magneto-Optical Properties of Sputter-Deposited and Annealed Co-Pt Alloys

  • Sung-Eon Park (a1), Pu-Young Jung (a1), Ki-Bum Kim (a1), Seh-Kwang Lee (a2) and Soon-Gwang Kim (a2)...

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