About

Serban is a Lecturer in the Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy, specializing in thin film magnetism, multiferroic materials, and micromagnetics simulations.

Serban completed a PhD in Condensed Matter Physics at the University of York in 2007, thesis title “Domain wall scattering and current induced magnetic switching in patterned ferromagnetic nanowires”. Between 2005 and 2006, Serban worked as a research assistant in the Physics Department at The University of York, in a joint theoretical and experimental study of the ultrafast optically induced demagnetization and magnetization recovery processes in patterned ferromagnetic films.

Between 2007 and 2012 Serban worked as a postdoctoral researcher within the Condensed Matter Group at Leeds University and has been involved in a number of large collaborative networks and projects, including Spin@RT and ESF – SPINCURRENT.

Between 2012 and 2014 Serban worked as a Higher Research Scientist at the National Physical Laboratory in the Functional Materials Group. Serban was involved in several large research projects involving several universities, research organizations and industrial partners worldwide. These projects included the FP7 V-SMMART, EMRP Nanostrain, Nanomotion ITN, Nanoferroelectrics II IRD and VAMAS PFM.

Selected Publications

V. Brehm, J.W. Austefjord, S. Lepadatu, and A. Qaiumzadeh, “A proposal for leaky integrate-and-fire neurons by domain walls in antiferromagnetic insulators” Scientific Reports 13, 13404 (2023)

V. Brehm, O. Gomonay, S. Lepadatu, M. Kläui, J. Sinova, A. Brataas, and A. Qaiumzadeh, “Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators” Physical Review B 107, 184404 (2023)

R. Khoshlahni, S. Lepadatu, M. Kouhi, and M. Mohseni, “Skyrmion dynamics induced by surface acoustic waves in antiferromagnetic systems” Physical Review B 107, 144421 (2023)

S. Lepadatu, “All-Optical Magnetothermoelastic Skyrmion Motion” Physical Review Applied 19, 044036 (2023)

S. Lepadatu and A. Dobrynin, “Self-consistent computation of spin torques and magneto-resistance in tunnel junctions and magnetic read-heads with metallic pinhole defects” Journal of Physics: Condensed Matter 35, 115801 (2023)

C.R. MacKinnon, K. Zeissler, S. Finizio, J. Raabe, C.H. Marrows, T. Mercer, P.R. Bissell, and S. Lepadatu, “Collective skyrmion motion under the influence of an additional interfacial spin‑transfer torque” Scientific Reports 12, 10786 (2022)

S. Lepadatu “Speeding Up Explicit Numerical Evaluation Methods for Micromagnetic Simulations Using Demagnetizing Field Polynomial Extrapolation” IEEE Transactions on Magnetics 58, 1 (2022)

S. Lepadatu “Micromagnetic Monte Carlo method with variable magnetization length based on the Landau–Lifshitz–Bloch equation for computation of large-scale thermodynamic equilibrium states” Journal of Applied Physics 130, 163902 (2021)

S. Lepadatu, G. Mckenzie, T. Mercer, C.R. MacKinnon, P.R. Bissell, “Computation of magnetization, exchange stiffness, anisotropy, and susceptibilities in large-scale systems using GPU-accelerated atomistic parallel Monte Carlo algorithms” Journal of Magnetism and Magnetic Materials 540, 168460 (2021)

S. Lepadatu, “Boris computational spintronics — High performance multi-mesh magnetic and spin transport modeling software”, Journal of Applied Physics 128, 243902 (2020)

C.R. MacKinnon, S. Lepadatu, T. Mercer, and P.R. Bissell “Role of an additional interfacial spin-transfer torque for current-driven skyrmion dynamics in chiral magnetic layers” Physical Review B 102, 214408 (2020)

S. Lepadatu “Emergence of transient domain wall skyrmions after ultrafast demagnetization” Physical Review B 102, 094402 (2020)

M.M. Vopson, M. Belusky, and S. Lepadatu “Diamagnetic coupling for magnetic tuning in nano-thin films” Applied Physics Letters 116, 252402 (2020)

S. Lepadatu, “Efficient computation of demagnetizing fields for magnetic multilayers using multilayered convolution” Journal of Applied Physics 126, 103903 (2019)

M. Belusky, S. Lepadatu, J. Naylor, M.M. Vopson, “Study of roughness effect in Fe and Co thin films prepared by plasma magnetron sputtering” Physica B 574, 411666 (2019)

S. Lepadatu, “Effect of inter-layer spin diffusion on skyrmion motion in magnetic multilayers” Scientific Reports 9, 9592 (2019)

M. Belusky, S. Lepadatu, J. Naylor, M.M. Vopson, “Evidence of substrate roughness surface induced magnetic anisotropy in Ni80Fe20 flexible thin films” JMMM 478, 77 (2019)

S. Lepadatu, “Unified treatment of spin torques using a coupled magnetisation dynamics and three-dimensional spin current solver” Scientific Reports 7, 12937 (2017)

S. Lepadatu, M.M. Vopson, “Heat assisted multiferroic solid-state memory” Materials 10, 991 (2017)

S. Lepadatu, H. Saarikoski, R. Beacham, M.J.B. Romero, T.A. Moore, G. Burnell, S. Sugimoto, D. Yesudas, M.C. Wheeler, J. Miguel, S.S. Dhesi, D. McGrouther, S. McVitie, G. Tatara, and C.H. Marrows, “Very low critical current density for motion of coupled domain walls in synthetic ferrimagnet nanowires” Scientific Reports 7, 1640 (2017)

S. Lepadatu, “Interaction of Magnetization and Heat Dynamics for Pulsed Domain Wall Movement with Joule Heating” Journal of Applied Physics 120, 163908 (2016)

S. Lepadatu, “Effective field model of roughness in magnetic nano-structures” Journal of Applied Physics 118, 243908 (2015)

M. Stewart, S. Lepadatu, L. N. McCartney, M. G. Cain, L. Wright, J. Crain, D. M. Newns and G. J. Martyna, “Electrode size and boundary condition independent measurement of the effective piezoelectric coefficient of thin films” APL Materials 3, 026103 (2015)

C. Chen, H. Ning, S. Lepadatu, M. Cain, H. Yan and M.J. Reece, “Ferroelectricity in Dion-Jacobson ABiNb(2)O(7) (A = Rb, Cs) compounds” Journal of Materials Chemistry C  3, 19 (2015)

J. Alaria, P. Borisov, M.S. Dyera, T.D. Manning, S. Lepadatu, M.G. Cain, E.D. Mishinad, N.E. Sherstyukd, N.A. Ilyind, J. Hadermanne, J.B. Claridge and M.J. Rosseinsky, “Isosymmetric magnetic oxide heterostructure with engineered spatial inversion symmetry breaking” Chemical Science 5, 1599 (2014)

S. Lepadatu, M. Stewart, M.G. Cain, “Quantification of electromechanical coupling measured with Piezoresponse Force Microscopy”, Journal of Applied Physics 116, 066806 (2014)

L. San Emeterio Alvarez, K.-Y. Wang, S. Lepadatu, S. Landi, S.J. Bending, and C.H. Marrows, “Spin-Transfer-Torque-Assisted Domain-Wall Creep in a Co-Pt Multilayer Wire”, Physical Review Letters 104, 137205 (2010)

S. Lepadatu, O. Wessely, A. Vanhaverbeke, R. Allenspach, A. Potenza, H. Marchetto, T. R. Charlton, S. Langridge, S.S. Dhesi and C. H. Marrows, “Domain-wall spin-torque resonators for frequency-selective operation”, Physical Review B 81, 060402(R) (2010), Editor’s Suggestion

S. Lepadatu, J.S. Claydon, C.J. Kinane, T.R. Charlton, S. Langridge, A. Potenza, S.S. Dhesi, P.S. Keatley, R.J. Hicken, B. J. Hickey and C. H. Marrows, “Domain-wall pinning, nonadiabatic spin-transfer torque, and spin-current polarization in permalloy wires doped with vanadium”, Physical Review B 81, 020413(R) (2010)

S. Lepadatu, M. C. Hickey, A. Potenza, H. Marchetto, T.R. Charlton, S. Langridge, S.S. Dhesi and C. H. Marrows, “Experimental determination of spin-transfer torque nonadiabaticity parameter and spin polarization in permalloy”, Physical Review B 79, 094402 (2009)

S. Lepadatu, A. Vanhaverbeke, D. Atkinson, R. Allenspach and C. H. Marrows, “Dependence of Domain-Wall Depinning Threshold Current on Pinning Profile”, Physical Review Letters 102, 127203 (2009)

S. Lepadatu and Y.B. Xu, “Direct observation of domain wall scattering in patterned Ni80Fe20 and Ni nano-contacts”, Physical Review Letters 92, 127201 (2004)