Berlin 2015 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 116: Spintronics (incl. Quantum Dynamics) (jointly with MA, HL)

TT 116.1: Hauptvortrag

Freitag, 20. März 2015, 09:30–10:00, EB 202

Antiferromagnetic spintronics — •Tomas Jungwirth — Institute of Physics v.v.i., ASCR, Prague, Czech Republic

Atiferromagnets (AFMs) have for decades played a passive role in conventional spin-valve structures where they provide pinning of the reference ferromagnetic layer. This implies that on one hand, incorporation of some AFM materials in common spintronic structures is well established. On the other hand, limiting their utility to a passive pinning role leaves a broad range of spintronic phenomena and functionalities based on AFMs virtually unexplored. Apart from the insensitivity to magnetic fields and the lack of stray fields, AFMs are common among metals, semiconductors, and insulators and can have orders of magnitude shorter spin-dynamics timescales, to name a few immediate merits of the foreseen concept of AFM spintronics. Several non-relativistic and relativistic spin-transport phenomena have been proposed for AFMs to complement or replace ferromagnets in active parts of spintronic devices. We will focus on the theory of relativistic phenomena and their utility in experimental AFM magneto-resistors, memories, and structures in which AFMs are employed to control ferromagnets electrically.

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