Magnetic multilayer device having resonant-tunneling double-barr

Details Magnetic multilayer device having resonant-tunneling double-barr Magnetic multilayer device having resonant-tunneling double-barr

1995-09-28

1997-06-03

Evans, Jefferson

Dynamic magnetic information storage or retrieval

Head

Core

360113, 257 25, G11B 5147, H01L 2714

Patent

active

056360932

ABSTRACT:
A magnetic multilayer device (1) comprising two layers (3, 5) of magnetic material which are separated by an interposed layered structure comprising a resonant-tunneling double-barrier structure (RTDBS) (7). In such a device (1), exchange coupling between the magnetic layers (3, 5) can be modified by subjection of the RTDBS (7) to an electric field. In this way, the configuration of the magnetisations (M.sub.1, M.sub.2) in the magnetic layers (3, 5), and thus the net magnetic flux generated by the device (1), can be electrically adjusted. The device (1) can be applied inter alia in a magnetic recording head.

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