Dresden 2017 – scientific programme
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MA: Fachverband Magnetismus
MA 55: Thin Films: Magnetic Anisotropy
MA 55.8: Talk
Thursday, March 23, 2017, 17:00–17:15, HSZ 101
Compensated magnetic state in tetragonal thin films for antiferromagnetic spintronics — •Roshnee Sahoo1, Ajaya K. Nayak2, Lukas Wollmann1, Stuart Parkin2, and Claudia Felser1 — 1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2Max Planck Institute of Microstructure Physics, Halle, Germany
Heusler compounds are well known for their potential applications in spintronics [1]. In recent years, antiferromagnetic spintronics has received much attention since ideal antiferromagnets do not produce stray fields and are much more stable to external magnetic fields compared to materials with net magnetization. Similar to antiferromagnets, compensated ferrimagnets have zero net magnetization but have the potential for large spin-polarization and strong out of plane magnetic anisotropy.
In the present work, we report a completely compensated magnetic state and tunable magnetic anisotropy in Mn-Pt-Ga based tetragonal thin films [2]. It is also demonstrate that bilayers formed from compensated and uncompensated Mn-Pt-Ga layers, exhibit a large interfacial exchange bias field up to room temperature.The present system establishes a distinct approach of designing spintronic devices that are formed from materials with similar elemental compositions and nearly identical crystal and electronic structures, and, hence, are of significant practical value due to their high thermal stabilities.
[1]C. Felser et al, Appl. Phys. Lett. Mater.3, 041518 (2015).
[2]R. Sahoo et al, Adv. Mater.28, 8499-8504 (2016).