Increasing Output Power by impedance matching Description Impedance mismatch between the STNO device (for MTJs 100 – 1000 Ohm) and standard RF circuitry (at 50 Ohm) leads to a reduction of the output power of 10 dB. Proper impedance matching is thus important. Partners LETI/DCOS ; LETI/DACLE Financing ANR-05-NANO-44 MagICO (2005-2008) ; OSEO/Anvar (2005-2009) ; Carnot RF (2006-20010) ; […]

Spin torque driven excitation spectra and microwave performances for different STNO configurations Description The dynamic response under spin transfer torque depends on the magnetization configuration of the polarizer and the free layer. At SPINTEC we have focused on two configurations which are (i) a perpendicular polarizer or (ii) a synthetic antiferromagnetic free layer. Partners LETI/DCOS […]

Injection and detection of pure spin currents using ferromagnetic resonance Description Damping enhancement in ferromagnetic resonance to study spin current injection from FM1 and spin absorption in FM2 or NM in magnetic heterostructures FM1/Cu/FM2 or FM1/Cu/NM. Partners Prof. W. E. Bailey, Columbia University, New York, USA F. Wilhelm, A. Rogalev, European Synchrotron Radiation Facility (ESRF), […]

Development of magnetic tunnel junctions (MTJ) of low RA and high TMR Description Optimization of the deposition parameters using the LETI/DCOS IBS sputtering deposition tool from SPTS to realize high quality magnetic tunnel junction oscillators of different device configurations. Partners LETI/DCOS (Marie Claire Cyrille) CEA/SPEC Saclay (Olivier Klein) CNRS/THALES (Vincent Cros, Julien Kermorvant) Financing ANR-09-NANO-037 […]

L.D. Buda-Prejbeanu, H. Szambolics, F. Garcia-Sanchez, I. Firastrau, J.Ch. Toussaint The effect of the spin polarized current on the magnetization dynamics is an extremely hot topic nowadays both from fundamental and applicative point of view. The micromagnetic modeling become in this context an irreplaceable prediction tool for exploring at nm length scale the magnetization distribution […]

Un livre auquel Spintec a contribué a reçu un prix de la Société de Magnétisme du Japon, Baraduc, C. (2014)

B. Dieny, R.C. Sousa, J.P. Nozières, O. Redon, I.L. Prejbeanu, Magnetic Random Access Memories (Ch.28), in Nanoelectronic and Information Technology, R. Waser Ed., Wiley-VCH (2011). ISBN: 978-3-527-40927-3. Spinelectronics is a rapidly expanding area of research and development which merges magnetism and electronics (See Chapter 4 for insights on the related basics). Since the discovery of […]

A. Manchon, N. Ryzhanova, M. Chshiev, A. Vedyaev, K.J. Lee, B. Dieny, Spin transfer torques in magnetic tunnel junctions, 63-106, in Giant Magnetoresistance: New Research, Eds: A. D. Torres and D. A. Perez, Nova Science Publishers, Inc. (2009). ISBN: 978-161324951-2, 978-160456733-5 Abstract This chapter presents a review on spin transfer torque in magnetic tunnel junctions. […]

B. Diény, Magnetic thin films and multilayers, 255-304, Ch.20, in Magnetism, Springer (2002). DOI: 10.1007/978-0-387-23063-4_6 Abstract Progress in high vacuum and ultra high vacuum material preparation techniques now allow the preparation of artificial structures consisting of ultra thin films of magnetic materials, as well as multilayer systems containing stacks of different materials, some of which […]