Multilayers for magnetooptical ultrahigh density recording

Objective

Next generations of magnetic recording will use bit sizes well below one Um ("Ultrahigh Density Recording"). Recently, Betzig et al. (Appl. Phys. Lett. 61, 142(1992)) showed that bits as small as 60nm in diameter could be recorded in Co/Pt multilayers, using a Magneto-Optical Scanning Near field Optical Microscope (MO-SNOM). The work proposed here will bear on this subject. (Pt/F) alloys and multilayers with F= Co, Fe, CoNi, etc..., will be grown using a multitarget sputtering unit on different amorphous or crystalline substrate structures. Samples will be characterized either with conventional means: X ray diffraction, TEM, STM/AFM, magnetometry, magnetooptical Kerr spectroscopy, or using a MO-SNOM currently being developed on the basis of an already operating SNOM with 20nm resolution. Interface and structural properties will be optimized to get perpendicular magnetization, enhanced magnetooptical effects, and a micromagnetic behaviour adapted to the writing of "nano"-bits with minimum wall jaggedness.

Programme(s)

• FP4-TMR - Specific research and technological development programme in the field of the training and mobility of researchers, 1994-1998

Topic(s)

• 0302 - Post-doctoral research training grants
• TP10 - Condensed Matter - Electronic, Magnetic & Superconduct.Properties

Funding Scheme

RGI - Research grants (individual fellowships)

Coordinator

UNIVERSITE DE PARIS-SUD XI

Address

Université Paris Xi - Bètiment 414
91405 Orsay
France

Participants (1)

Not available

Germany