Elementary spin excitations in ultrathin itinerant magnets
K Zakeri - Physics Reports, 2014 - Elsevier
Elementary spin excitations (magnons) play a fundamental role in condensed matter
physics, since many phenomena eg magnetic ordering, electrical (as well as heat) transport …
physics, since many phenomena eg magnetic ordering, electrical (as well as heat) transport …
Magnonic crystals: towards terahertz frequencies
K Zakeri - Journal of Physics: Condensed Matter, 2020 - iopscience.iop.org
This topical review presents an overview of the recent experimental and theoretical attempts
on designing magnonic crystals for operation at different frequencies. The focus is put on the …
on designing magnonic crystals for operation at different frequencies. The focus is put on the …
Atomistic spin dynamics and surface magnons
Atomistic spin dynamics simulations have evolved to become a powerful and versatile tool
for simulating dynamic properties of magnetic materials. It has a wide range of applications …
for simulating dynamic properties of magnetic materials. It has a wide range of applications …
Doping of large amount tetravalent Ge ions into Fe2O3 structure and experimental results on modified structural, optical and electronic properties
DS GT, RN Bhowmik - Materials Science in Semiconductor Processing, 2024 - Elsevier
We report the doping of high concentration of tetravalent Ge 4+ ions (5 mol% for x= 0.05–30
mol% for x= 0.30) at the Fe 3+ sites of Fe 2-x Ge x O 3 system by chemical coprecipitation …
mol% for x= 0.30) at the Fe 3+ sites of Fe 2-x Ge x O 3 system by chemical coprecipitation …
Spin dynamics simulations of topological magnon insulators: From transverse current correlation functions to the family of magnon Hall effects
We demonstrate theoretically that atomistic spin dynamics simulations of topological
magnon insulators (TMIs) provide access to the magnon-mediated transport of both spin and …
magnon insulators (TMIs) provide access to the magnon-mediated transport of both spin and …
Relaxation time of terahertz magnons excited at ferromagnetic surfaces
Y Zhang, TH Chuang, K Zakeri, J Kirschner - Physical review letters, 2012 - APS
The temporal and spatial properties of terahertz magnons excited at ferromagnetic fcc Co
(100) and bcc Fe (110) surfaces are investigated experimentally. The magnon lifetime is …
(100) and bcc Fe (110) surfaces are investigated experimentally. The magnon lifetime is …
Atomistic spin dynamics of low-dimensional magnets
We investigate the magnetic properties of a range of low-dimensional ferromagnets using a
combination of first-principles calculations and atomistic spin dynamics simulations. This …
combination of first-principles calculations and atomistic spin dynamics simulations. This …
Generation and Propagation of Ultrafast Terahertz Magnons in Atomically Architectured Nanomagnets
K Zakeri, A Ernst - Nano Letters, 2024 - ACS Publications
Utilizing ultrafast terahertz (THz) magnons, the quanta of collective magnetic excitations, as
carriers may provide a promising alternative to overcome the problems associated with …
carriers may provide a promising alternative to overcome the problems associated with …
Experimental realization of atomic-scale magnonic crystals
We introduce a new approach of materials design for terahertz magnonics making use of
quantum confinement of terahertz magnons in layered ferromagnets. We show that in …
quantum confinement of terahertz magnons in layered ferromagnets. We show that in …
Correlations, disorder, and multimagnon processes in terahertz spin dynamics of magnetic nanostructures: A first-principles investigation
S Paischer, D Eilmsteiner, I Maznichenko, N Buczek… - Physical Review B, 2024 - APS
Understanding the impact of electronic correlations and disorder is essential for an accurate
description of solids. Here, we study the role of correlations, disorder, and multimagnon …
description of solids. Here, we study the role of correlations, disorder, and multimagnon …