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The CoCr/Pt bilayers and (CoCr/Pt)20 multilayers with Pt underlayer were prepared by DC magnetron sputtering. The effects of prepared condition on perpendicular magnetic anisotropy were investigated. The results show that the thickness of Pt under-layer has a great effect on the microstructure and perpendicular magnetic anisotropy of CoCr/Pt bilayers and (CoCr/Pt)20 multilayers. When the thickness of Pt underlayer increases, Pt(111) and CoCr(002) peaks of both CoCr/Pt bilayers and (CoCr/Pt)20 multilayers increase and the bilayer periodicity of the multilayers is improved. The effective magnetic anisotropy of (CoCr/Pt)20 multilayers with Pt underlayer was much larger than that of CoCr/Pt bilayers. The (CoCr/Pt)20 multilayers has a stronger perpendicular magnetic anisotropy than that of CoCr/Pt bilayers. This is ascribed to the interface magnetic anisotropy of the multilayers.
The effects of prepared conditions on magnetic anisotropy were investigated. The results show that the thickness of Pt under-layer has a great effect On the microstructure and perpendicular magnetic anisotropy of CoCr / Pt bilayers and (CoCr / Pt) 20 multilayers. When the thickness of Pt underlayer increases, Pt (111) and CoCr (002) peaks of both CoCr / Pt bilayers and The effective magnetic anisotropy of (CoCr / Pt) 20 multilayers with Pt underlayer was much larger than that of CoCr / Pt bilayers. The (CoCr / Pt) 20 multilayers have a stronger perpendicular magnetic anisotropy than that of CoCr / Pt bilayers. This is ascribed to the interface magnetic anisotropy of the multilayers.