307 citations · 872 across the 18 of their papers we have counts for
18 papers
How to distinguish between interacting and noninteracting molecules in tunnel junctions
Miguel A. Sierra, David Sánchez, Alvar R. Garrigues +3
Recent experiments demonstrate a temperature control of the electric conduction through a ferrocene-based molecular junction. Here we examine the results in view of determining mea…
Effects of uniaxial pressure on the quantum tunneling of magnetization in a high-symmetry Mn12 single-molecule magnet
James H. Atkinson, Adeline D. Fournet, Lakshmi Bhaskaran +6
The symmetry of single-molecule magnets dictates their spin quantum dynamics, influencing how such systems relax via quantum tunneling of magnetization (QTM). By reducing a system'…
Moderate Positive Spin Hall Angle in Uranium
Simranjeet Singh, Marta Anguera, Enrique del Barco +2
We report measurements of spin pumping and the inverse spin Hall effect in Ni80Fe20/Uranium bilayers designed to study the efficiency of spin-charge interconversion in a super-heav…
Dynamical spin injection at a quasi-one-dimensional ferromagnet-graphene interface
S. Singh, A. Ahmadi, C. T. Cherian +3
We present a study of dynamical spin injection from a three-dimensional ferromagnet into two-dimensional single-layer graphene. Comparative ferromagnetic resonance (FMR) studies of…
Nanometric constrictions in superconducting coplanar waveguide resonators
Mark David Jenkins, Uta Naether, Miguel Ciria +7
We report on the design, fabrication and characterization of superconducting coplanar waveguide resonators with nanoscopic constrictions. By reducing the size of the center line do…
Three-Leaf Quantum Interference Clovers in a Trigonal Single-Molecule Magnet
James H. Atkinson, Ross Inglis, Enrique del Barco +1
The control of spin-orbit coupling (SOC) at the microscopic level has become a major research quest within the magnetism and spintronics communities. Altering the interaction betwe…
Implementing Elements of The Physics Suite at a Large Metropolitan Research University
Costas Efthimiou, Dan Maronde, Tim McGreevy +2
A key question in physics education is the effectiveness of the teaching methods. A curriculum that has been investigated at the University of Central Florida (UCF) over a period o…
Magnetic Quantum Tunneling: Insights from Simple Molecule-Based Magnets
Stephen Hill, Saiti Datta, Junjie Liu +7
This article takes a broad view of the understanding of magnetic bistability and magnetic quantum tunneling in single-molecule magnets (SMMs), focusing on three families of relativ…
Tunneling and inversion symmetry in single-molecule magnets: the case of the Mn12 wheel molecule
E. del Barco, S. Hill, C. C. Beedle +3
We present a detailed study of the influence of various interactions on the spin quantum tunneling in a Mn12 wheel molecule. The effects of single-ion and exchange (spin-orbit) ani…
Comment on "Influence of Dzyaloshinskii-Moriya Exchange Interaction on Quantum Phase Interference of Spins"
E. del Barco, S. Hill, D. N. Hendrickson
In a recent Letter [1], Wernsdorfer et al. report an experimental study of a Mn12 molecular wheel which shows essentially identical behavior to the Mn12 wheel studied by Ramsey et…
Quantum Coherence between High Spin Superposition States of Single Molecule Magnet Ni
E. del Barco, A. D. Kent, E. C. Yang +1
Magnetic quantum tunneling in a single molecule magnet (SMM) has been studied in experiments that combine microwave spectroscopy with high sensitivity magnetic measurements. By mon…
Tunneling Splittings in Mn12-Acetate Single Crystals
E. del Barco, A. D. Kent, E. M. Rumberger +2
A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high quality Mn-acetate single crystals in the pure quantum relaxation regime and…
Quadratic transverse anisotropy term due to dislocations in Mn12-Ac directly obtained by EPR spectroscopy
R. Amigo, E. del Barco, Ll. Casas +6
High-Sensitivity Electron Paramagnetic Resonance experiments have been carried out in fresh and stressed Mn12-Acetate single crystals for frequencies ranging from 40 GHz up to 110…
Relaxation and Landau-Zener experiments down to 100 mK in ferritin
M. Duran, E. del Barco, J. M. Hernandez +1
Temperature-independent magnetic viscosity in ferritin has been observed from 2 K down to 100 mK, proving that quantum tunneling plays the main role in these particles at low tempe…
Millikelvin magnetic relaxation measurements of alpha-Fe2O3 antiferromagnetic particles
E. del Barco, J. M. Hernandez, M. Duran +4
In this paper we report magnetic relaxation data for antiferromagnetic alpha-Fe2O3 particles of 5 nm mean diameter in the temperature range 0.1 K to 25 K. The average spin value of…
Magnetic qubits as hardware for quantum computers
J. Tejada, E. M. Chudnovsky, E. del Barco +2
We propose two potential realisations for quantum bits based on nanometre scale magnetic particles of large spin S and high anisotropy molecular clusters. In case (1) the bit-value…
High frequency resonant experiments in Fe molecular clusters
E. del Barco, J. M. Hernandez, J. Tejada +5
Precise resonant experiments on Fe magnetic clusters have been conducted down to 1.2 K at various tranverse magnetic fields, using a cylindrical resonator cavity with 40 diff…
Quantum Coherence in Fe8 Molecular Nanomagnets
E. del Barco, N. Vernier, J. M. Hernandez +4
We report observation of coherent quantum oscilations in spin-10 Fe8 molecular clusters. The powder of magnetically oriented Fe8 crystallites was placed inside a resonator, in a dc…