Magnetic degradation of thin film multilayers during ion milling | Zendy

J.C. Read | Zendy; P. M. Braganca | Zendy; Neil L. Robertson | Zendy; J. R. Childress | Zendy

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Magnetic degradation of thin film multilayers during ion milling

Author(s) -

J.C. Read,

P. M. Braganca,

Neil L. Robertson,

J. R. Childress

Publication year - 2014

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4870802

Subject(s) - materials science , degradation (telecommunications) , ion , layer (electronics) , exchange bias , ion milling machine , thin film , coupling (piping) , ferromagnetism , condensed matter physics , iron alloys , composite material , magnetic anisotropy , metallurgy , magnetic field , nanotechnology , magnetization , electronic engineering , physics , quantum mechanics , engineering

We present a study of Ar ion milling-induced damage in exchange biased IrMn/CoFe/Ag-based magnetic multilayer thin films. While process variations determine the change in CoFe magnetic properties, the distance from the ion milling front to the IrMn/CoFe interface dominates the extent of exchange bias damage. Remarkably, the interfacial coupling energy Jk can be reduced by 50% before any removal of the CoFe pinned layer. We attribute the losses to microstructural changes and damage effects where cap material is driven into the CoFe layer below. Disturbance depth estimates from ion impact simulations agree reasonably with the observed length scales of damage

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