Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 64: Poster 1

MA 64.49: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-EG

Micro-Hall magnetometry on macro-, micro- and nanoscale samples — •Mohanad K I Mamoori, Merlin Pohlit, Jonathan Pieper, and Jens Müller — Physikalisches Institut, Goethe-Universität Frankfurt, 60438 Frankfurt am Main , Germany

Micro-Hall sensors are versatile tools for studying the local magnetic induction of macro-, micro- and nano-scale samples in a wide range of temperatures and magnetic fields. Along with measurements of thermal dynamics in artificial spin ice systems [1], we recently have applied First Order Reversal Curves (FORC) – a powerful technique to characterize the hysteresis loop of magnetic materials in detail and to study various intrinsic effects as, e.g., different grain sizes, dipolar interactions, and phase mixtures – to individual and dipolar-coupled arrays of magnetic nanostructures using micro-Hall sensors [2].
In this presentation, we review the different areas of the sensor applications discussing both static and dynamic measurments, and focus on the investigation of local effects in macroscopic samples, ranging from the formation of nano-scale magnetic clusters in colossal magnetoresistance materials to avalanche dynamics in metallic glasses.
Pohlit et al., J. Appl. Phys. 120, 142103 (2016).
Pohlit et al., Rev. Sci. Instrum. 87, 113907 (2016).