Physical Properties of CoFe/IrMn Spin-Valves Prepared Using Ion Beam Sputtering with an Xe-H 2 Mixture Gas
Co 90 Fe 10 /Cu/Co 90 Fe 10 /Ir 25 Mn 75 spin-valves with a Ta seed layer were prepared by ion beam sputtering. Improvements in magnetoresistive (MR) and magnetic properties were obtained by adding H 2 to Xe sputtering gas. Specifically, the coercivity in the free Co 90 Fe 10 layer considerably decr...
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Veröffentlicht in: | Japanese Journal of Applied Physics 1997-11, Vol.36 (11R), p.6746 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Co
90
Fe
10
/Cu/Co
90
Fe
10
/Ir
25
Mn
75
spin-valves with a Ta seed layer were prepared by ion beam sputtering. Improvements in magnetoresistive (MR) and magnetic properties were obtained by adding H
2
to Xe sputtering gas. Specifically, the coercivity in the free Co
90
Fe
10
layer considerably decreased as the H
2
flow rate was increased. Furthermore, exchange coupling between the Ir
25
Mn
75
and pinned Co
90
Fe
10
layers became stronger in the preparation under the higher H
2
flow rate. X-ray diffraction, transmission electron microscopy, and secondary ion mass spectroscopy observations suggest that micro-crystallization of each layer is responsible for improving the MR and magnetic properties. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.36.6746 |