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Holographic imaging of magnetization in a single layer nano-contact spin transfer oscillator.

DOI: 10.1109/TMAG.2016.2528959 DOI Help

Authors: Erick Omar Burgos Parra (University of Exeter) , Nicholas Bukin (University of Exeter) , Maxime Dupraz (SIMAP) , Guillaume Beutier (CEA, INAC) , Sohrab Redjai Sani (KTH Royal Institute of Technology) , Horia Popescu (Synchrotron Soleil) , Stuart Cavill (University of York, Diamond Light Source) , Johan Akerman (KTH- Royal Insitute of Technology, Kista, Sweden.) , Nicolas Jaouen (Synchrotron Soleil) , Paul Keatley (University of Exeter) , Robert Hicken (University of Exeter) , Gerrit Van Der Laan (Diamond Light Source) , Feodor Ogrin (University of Exeter)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Ieee Transactions On Magnetics

State: Published (Approved)
Published: February 2016

Abstract: Time-averaged images of the magnetization within single layer spin transfer oscillators have been obtained using the holography with extended reference by autocorrelation linear differential operator (HERALDO) technique. Transport measurements on a Pd(5)-Cu(20)-Ni81Fe19(7)-Cu(2)-Pd(2) (in nm) stack with a 100 nm diameter nano-contact reveal the presence of vortex dynamics. Magnetic images of the device for injected current values of 24mA and -24mA suggest that a vortex has been ejected from the nano-contact and become pinned at the edge of the region that is visible through the Au mask.

Journal Keywords: HERALDO, Magnetic vortex, Spin transfer torque, X-ray holography

Subject Areas: Physics, Materials, Technique Development

Facility: SOLEIL