Heusler Alloy Replacement for Iridium Atsufumi Hirohata Participant Pitches Department of Electronics November 2013 Knowledge Transfer Networks Accelerating business innovation; a Technology Strategy Board programme
Topic (s) of interest and project idea • Melting point : > 3,000 ° C → Very stable • Almost no applications previously • World supply : ~ 5.8 t / yr → 87 % from South Africa • 1 ~ 2 % in Pt and Rh ore • The scarecest element → 4 × 10 -4 ppm Comparisons Nd : 33 ppm Li : 17 ppm Dy : 6.2 ppm Pt : 3.7 × 10 -3 ppm Au : 3.1 × 10 -3 ppm Ru : 1 × 10 -3 ppm * http://www.atheistfrontier.com/people/dmitri-mendeleyev/periodic-table-of-the-elements-for-kids.jpg Knowledge Transfer Networks Accelerating business innovation; a Technology Strategy Board programme
Organisation York Bielefeld York model, TEM, e-beam Heusler-alloy TMR, XMLD Device concept using New alternative material for spintronics Ir-free Heusler-alloy antiferromagnet Tohoku Heusler-alloy GMR Konstanz / Budapest KEK interfacial atomistic modelling synchrotron, XMCD, PNR Knowledge Transfer Networks Accelerating business innovation; a Technology Strategy Board programme
What I have to offer and partners sought Magnetic random access memory (MRAM) : HDD read head : Current Antiferromagne IrMn t Pinning by exchange bias • Large exchange bias Pinned (> 3.5 kOe) M pin ferromagnet • Low set temperature (~ 250 ° C) Non-magnet • Thin-film form Free (~ 6 nm) M free or ferromagnet Replacement with a Heusler alloy Spin-valve structure Knowledge Transfer Networks Accelerating business innovation; a Technology Strategy Board programme
Recommend
More recommend
