SFB/TRR 173 SPIN+X

Second Funding Period 2020-2023:

B01  Spin+Magnon: Spin excitations for information processing

Dr. Philipp Pirro (Department of Physics, TU Kaiserslautern)
Dr. habil. Oleksandr Serha (Department of Physics, TU Kaiserslautern)
Prof. Dr. Burkard Hillebrands (Department of Physics, TU Kaiserslautern)

Project B01 makes use of the collective excitations of the spin system, the spin waves, to create new functionalities in the form of magnon circuits. In the focus are novel concepts which go beyond conventional and linear logic. To achieve this, nonlinear magnonic devices as well as devices with memory functionality will be realized. In addition, the concept of “quantum-classical analogies” will be introduced into magnonics. It exploits the similarities between the equations describing processes in quantum systems and coherent spin wave systems in the classical limit. This will allow to use concepts developed in atom physics and photonics to improve magnonic devices.

 

First Funding Period 2016-2019:

B01  Spin+Magnon: Spin excitations for information processing

Dr. habil. Oleksandr Serha (Department of Physics, TU Kaiserslautern)
Dr. Philipp Pirro (Department of Physics, TU Kaiserslautern)
Dr. Andrii Chumak (Department of Physics, TU Kaiserslautern)

In project B01 collective spin excitations determined by exchange and dipolar spin-spin interactions in magnetically ordered materials – spin waves and their quanta, magnons, will be investigated in a view of their use for information processing. Magnons propagate without charge transfer and, thus, free of Ohmic losses through conducting and insulating magnetic materials. The magnon wavelengths lie in the range from many micrometers down to the nanometer scale making two-dimensional low-power devices of sub-micrometer sizes very feasible. Furthermore, magnons allow for a variety of magnetically controlled wave phenomena such as non-reciprocity, non-collinear group and phase velocities, non-diffractive propagation, self-focusing, etc., which promise new dimensionality in modern computing. In this project, the extensive know-how about magnon physics will be used to reveal the potential for magnon-based data processing by investigating non-reciprocal spin-wave edge dynamics in magnetically isotropic magnonic structures and non-diffractive spin-wave transport in non-uniformly magnetized media. By combining with advanced magnon transducers like nano-sized microwave antennas and inverse spin Hall effect based detectors these phenomena will be used for creation of energy-efficient spintronic circuits.

Aim 1: Understanding of non-reciprocal and non-diffractive magnon propagation and its manipulation;

Aim 2: Translation of magnon transport phenomena to functionalities of magnon spintronic circuits.

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