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Terahertz magnetoresistive effects in ferro/antiferro/alter-magnetic structures

Project description

THz magnetoresistive effects in novel materials

Very fast magnetoresistive effects – in the THz frequency range – are required to significantly increase data storage operational speeds for modern electronics. Current research has focused on ferromagnets in which magnetisation dynamics are limited to the GHz range. With the support of the Marie Skłodowska-Curie Actions programme, the Tera-MaRs project aims to investigate novel materials, including antiferromagnetic materials and newly discovered ‘altermagnetic’ materials. To evaluate the behaviours of the new materials, the team will study anisotropic magnetoresistance, giant magnetoresistance, and spin-Hall magnetoresistance using ultra-broadband THz time-domain spectroscopy in ferromagnetic, antiferromagnetic, and altermagnetic materials. Detailed understanding of magnetoresistive processes in the THz range will enable the development of significantly faster and more efficient spintronic devices.

Objective

Magnetoresistive effects are pivotal for data storage technologies in modern electronics. Understanding those phenomena at THz frequencies is a crucial prerequisite for the transition of operational speeds from nanosecond to picosecond timescales. Current THz magnetoresistive research has been restricted almost exclusively to ferromagnets. We will reach beyond those conventional materials, where the magnetization dynamics is limited to GHz frequencies, by exploring antiferromagnetic materials which exhibit THz magnetization dynamics. Finally, we will focus on newly discovered altermagnetic materials, which combine the advantageous properties of both, spin-polarized band structure of ferromagnets and THz dynamics of antiferromagnets.

We will investigate three key magnetoresistive effects: Anisotropic Magnetoresistance (AMR), Giant Magnetoresistance (GMR), and Spin-Hall Magnetoresistance (SMR) using ultra-broadband THz time-domain spectroscopy. Initially, we will conduct experiments on ferromagnetic structures, which are easy to manipulate with external magnetic fields. Our preliminary results have revealed a never-before-observed time delay of 10 fs in the onset of GMR, corroborating the importance of phase-sensitive measurements. Subsequently, we will focus on antiferromagnetic materials to capture both electron and magnetization dynamics, and ultimately, we will apply the insights to altermagnetic materials. A deeper and more detailed understanding of magnetoresistive mechanisms in THz range will enable the construction of significantly faster and more efficient spintronic devices.

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HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

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(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

FYZIKALNI USTAV AV CR V.V.I
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 207 758,16
Address
NA SLOVANCE 1999/2
182 21 Praha 8
Czechia

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Region
Česko Praha Hlavní město Praha
Activity type
Higher or Secondary Education Establishments
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Total cost

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