85 citations · 296 across the 17 of their papers we have counts for
14 papers · 1 filter
The Hidden Cost of Two-Dimensional TEM Reconstruction of Magnetic Nanoparticle Morphology
Iago López-Vázquez, Amira Páez, Yilian Fernández-Afonso +6
Conventional transmission electron microscopy (TEM) records two-dimensional (2D) projections of three-dimensional (3D) objects, complicating the inference of nanoparticle morpholog…
AC Field-driven orientational crossover and energy dissipation in suspended magnetic nanoparticles
Iago López-Vázquez, Siraj Ul Haq, Kazuya Okada +4
By combining the Landau--Lifshitz--Gilbert equation with Brownian rotational dynamics of magnetic nanoparticles (MNPs), we theoretically investigate the role of particle rotation t…
Higher-order magnetic anisotropy in soft-hard magnetic materials
Binh Nguyen, Sarah Jenkins, Sergiu Ruta +2
We have computationally studied the properties of higher-order magnetic anisotropy constants in an L10/A1-FePt coreshell system which is characterized by a strong second-order 2-io…
A route to minimally dissipative switching in magnets via THz phonon pumping
Mara Strungaru, Matthew O A Ellis, Sergiu Ruta +3
Advanced magnetic recording paradigms typically use large temperature changes to drive switching which is detrimental to device longevity, hence finding non-thermal routes is cruci…
Influence of the Finite-size Effects on the Curie Temperature of L10-FePt
Binh Thanh Nguyen, Sergiu Ruta, Ondrej Hovorka +2
We employ an atomistic model using a nearest-neighbor Heisenberg Hamiltonian exchange to study computationally the dependence of the Curie temperature of L10-FePt on finite-size an…
Non-equilibrium heating path for utrafast laser-induced nucleation of skyrmion lattices
Pablo Olleros-Rodríguez, Mara S. Strungaru, Sergiu I. Ruta +4
We explore the helicity-independent light-induced nucleation of skyrmion lattices in ferromagnetic cobalt-based trilayers with perpendicular magnetic anisotropy. Using Atomistic Sp…
Modeling coupled spin and lattice dynamics
Mara Strungaru, Matthew O A Ellis, Sergiu Ruta +3
A unified model of molecular and atomistic spin dynamics is presented enabling simulations both in microcanonical and canonical ensembles without the necessity of additional phenom…
Hypersonic heat-induced flows of magnons induced by femtosecond laser pulses
Sergiu Ruta, Zuwei Fu, Thomas Ostler +2
In this work, we present evidence for the existence of a magnonic current on the sub-picosecond time-scale in a ferrimagnetic bilayer and its effect on ultrafast spin dynamics. The…
Magnetisation dynamics of granular HAMR media by means of a multiscale model
Andrea Meo, Wasan Pantasri, Wassana Daeng-am +5
Heat assisted magnetic recording (HAMR) technology represents the most promising candidate to replace the current perpendicular recording paradigm to achieve higher storage densiti…
Model of damping and anisotropy at elevated temperatures: application to granular FePt films
Mara Strungaru, Sergiu Ruta, Richard F L Evans +1
Understanding the damping mechanism in finite size systems and its dependence on temperature is a critical step in the development of magnetic nanotechnologies. In this work, nano-…
Role of Element-Specific Damping on the Ultrafast, Helicity-Independent All-Optical Switching Dynamics in Amorphous (Gd,Tb)Co Thin Films
Alejandro Ceballos, Akshay Pattabi, Amal El-Ghazaly +9
Ultrafast control of the magnetization in ps timescales by fs laser pulses offers an attractive avenue for applications such as fast magnetic devices for logic and memory. However,…
Efficient all-optical helicity dependent switching of spins in a Pt/Co/Pt film by a dual-pulse excitation
Kihiro T. Yamada, Alexey V. Kimel, Kiran Horabail Prabhakara +7
All-optical helicity dependent switching (AO-HDS), deterministic control of magnetization by circularly polarized laser pulses, allows to efficiently manipulate spins without the n…
First order reversal curves and intrinsic parameter determination for magnetic materials; limitations of hysteron-based approaches in correlated systems
Sergiu Ruta, Ondrej Hovorka, Pin-Wei Huang +3
The generic problem of extracting information on intrinsic particle properties from the whole class of interacting magnetic fine particle systems is a long standing and difficult i…
Unified model of hyperthermia via hysteresis heating in systems of interacting magnetic nanoparticles
S. Ruta, O. Hovorka, R. Chantrell
We present a general study of frequency and magnetic field dependence of the specific heat power produced during field-driven hysteresis cycles in magnetic nanoparticles with relev…