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Heusler Alloys with bcc Tungsten Seed Layers for GMR Junctions

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JournalJournal of Magnetism and Magnetic Materials
DateAccepted/In press - 8 Jan 2018
DateE-pub ahead of print (current) - 8 Jan 2018
Early online date8/01/18
Original languageEnglish

Abstract

We demonstrate that polycrystalline Co2FeSi Heusler alloys lms can be grown with perpendicular anisotropy without the use of an MgO interface. By heating the substrate to 400 C prior to deposition and using a tungsten seed layer perpendicular anisotropy is induced in the Heusler layer. This is maintained as the thickness of the Co2FeSi is increased up to 12:5 nm. The layers with thickness dependent coercivity can be implemented into a giant magnetoresistance structure leading to spin-valve behaviour without the need for an exchange biased pinned layer.

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