554 citations · 2k across the 43 of their papers we have counts for
25 papers · 1 filter
Majorana Zero Modes Emulated in a Magnetic Molecule Chain
Silas Hoffman, Jie-Xiang Yu, Shuang-Long Liu +6
We propose molecular magnets as a platform to emulate Majorana zero modes (MZMs). Using a quantum chemistry approach, we identify several candidates and predict a Co trimer to have…
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'…
Onset of a Propagating Self-Sustained Spin Reversal Front in a Magnetic System
P. Subedi, S. Vélez, F. Macià +6
The energy released in a magnetic material by reversing spins as they relax toward equilibrium can lead to a dynamical instability that ignites self-sustained rapid relaxation alon…
Geometric-phase interference in a Mn_{12} single-molecule magnet with four-fold rotational symmetry
S. T. Adams, E. H. da Silva Neto, S. Datta +6
We study the magnetic relaxation rate Gamma of the single-molecule magnet Mn_{12}-tBuAc as a function of magnetic field component H_T transverse to the molecule's easy axis. When t…
On-chip SQUID measurements in the presence of high magnetic fields
L. Chen, W. Wernsdorfer, C. Lampropoulos +2
We report a low temperature measurement technique and magnetization data of a quantum molecular spin, by implementing an on-chip SQUID technique. This technique enables the SQUID m…
On the anisotropy barrier reduction in fast relaxing Mn12 single-molecule magnets
Stephen Hill, Muralee Murugesu, George Christou
A novel angle-swept high-frequency EPR (HFEPR) technique is described that enables in-situ alignment of single-crystal samples containing low-symmetry magnetic species such as sing…
A Caveat for Single-Molecule Magnetism: Non-linear Arrhenius Plots
Christos Lampropoulos, Stephen O. Hill, George Christou
The magnetization relaxation of Mn12 single-molecule magnets (SMMs) does not follow a simple Arrhenius law, even for data collected at low frequencies (5-1500 Hz) due to contributi…
Ignition and Propagation of Magnetic Avalanches in Mn-Acetate: the effect of quantum tunneling
S. McHugh, R. Jaafar, M. P. Sarachik +6
Using a wire heater to ignite magnetic avalanches in fixed magnetic field applied along the easy axis of single crystals of the molecular magnet Mn-acetate, we report fast l…
Fabrication of Nano-Gapped Single-Electron Transistors for Transport Studies of Individual Single-Molecule Magnets
J. J. Henderson, C. M. Ramsey, E. del Barco +2
Three terminal single-electron transistor devices utilizing Al/Al2O3 gate electrodes were developed for the study of electron transport through individual single-molecule magnets.…
Field sweep rate dependence of the coercive field of single-molecule magnets: a classical approach with applications to the quantum regime
W. Wernsdorfer, M. Murugesu, A. J. Tasiopoulos +1
A method, based on the Neel-Brown model of thermally activated magnetization reversal of a magnetic single-domain particle, is proposed to study the field sweep rate dependence of…
Landau-Zener tunneling in the presence of weak intermolecular interactions in a crystal of Mn4 single-molecule magnets
W. Wernsdorfer, S. Bhaduri, A. Vinslava +1
A Mn4 single-molecule magnet (SMM), with a well isolated spin ground state of S = 9/2, is used as a model system to study Landau-Zener (LZ) tunneling in the presence of weak interm…
Local Measurements of Magnetization in Mn12 Crystals
Nurit Avraham, Ady Stern, Yoko Suzuki +9
The spatial profile of the magnetization of Mn12 crystals in a swept magnetic field applied along the easy axis is determined from measurements of the local magnetic induction alon…
Comment on 'Pulsed field studies of the magnetization reversal in molecular nanomagnets'
W. Wernsdorfer, N. E. Chakov, G. Christou
In a recent paper, cond-mat/0404041, J. Vanacken et al. reported experimental studies of crystals of Mn12-ac molecular nanomagnets in pulsed magnetic fields with sweep rates up to…
Determination of the magnetic anisotropy axes of single-molecule magnets
W. Wernsdorfer, N. E. Chakov, G. Christou
Simple methods are presented allowing the determination of the magnetic anisotropy axes of a crystal of a single-molecule magnet (SMM). These methods are used to determine an upper…
Giant Single-Molecule Magnets: A Mn84 Torus and its Supramolecular Nanotubes
A. J. Tasiopoulos, A. Vinslava, W. Wernsdorfer +2
The discovery a decade ago that individual molecules can function as magnetizable magnets provided a new, 'bottom-up' approach to nanoscale magnetic materials, and such molecules h…
Evidence for the S=9 excited state in Mn12-bromoacetate measured by electron paramagnetic resonance
K. Petukhov, S. Hill, N. E. Chakov +2
We present high-frequency high-field electron paramagnetic resonance (EPR) measurements on the dodecanuclear manganese complex Mn12-bromoacetate (Mn12-BrAc). The crystal-field para…
Quantum Coherence in an Exchange-Coupled Dimer of Single-Molecule Magnets
S. Hill, R. S. Edwards, N. Aliaga-Alcalde +1
A multi-high-frequency electron paramagnetic resonance method is used to probe the magnetic excitations of a dimer of single-molecule magnets. The measured spectra display well res…
Observation of a Distribution of Internal Transverse Magnetic Fields in a Mn12-Based Single Molecule Magnet
E. del Barco, A. D. Kent, N. E. Chakov +4
A distribution of internal transverse magnetic fields has been observed in single molecule magnet (SMM) Mn12-BrAc in the pure magnetic quantum tunneling (MQT) regime. Magnetic rela…
Quantum tunneling in a three dimensional network of exchange coupled single-molecule magnets
R. Tiron, W. Wernsdorfer, N. Aliaga-Alcalde +2
A Mn4 single-molecule magnet (SMM) is used to show that quantum tunneling of magnetization (QTM) is not suppressed by moderate three dimensional exchange coupling between molecules…
Quantum Tunneling of Magnetization in a Large Molecular Nanomagnet -- Approaching the Mesoscale
W. Wernsdorfer, M. Soler, D. N. Hendrickson +1
A Mn30 molecular cluster is established to be the largest single-molecule magnet (SMM) discovered to date. Magnetization versus field measurements show coercive fields of about 0.5…
Quantum dynamics of exchange biased Single Molecule Magnets
W. Wernsdorfer, N. Aliaga-Alcalde, R. Tiron +2
We present a new family of exchange biased Single Molecule Magnets in which antiferromagnetic coupling between the two components results in quantum behaviour different from that o…
Long-range ferromagnetic dipolar ordering of high-spin molecular clusters
A. Morello, F. L. Mettes, F. Luis +5
We report the first example of a transition to long-range magnetic order in a purely dipolarly interacting molecular magnet. For the magnetic cluster compound Mn6O4Br4(Et2dbm)6, th…
The First Cobalt Single-Molecule Magnet
En-Che Yang, David N Hendrickson, Wolfgang Wernsdorfer +5
The first cobalt molecule to function as a single-molecule magnet, [Co4(hmp)4(MeOH)4Cl4], where hmp- is the anion of hydroxymethylpyridine, is reported. The core of the molecule co…
Spin-parity dependent tunneling of magnetization in single-molecule magnets
W. Wernsdorfer, S. Bhaduri, C. Boskovic +2
Single-molecule magnets facilitate the study of quantum tunneling of magnetization at the mesoscopic level. The spin-parity effect is among the fundamental predictions that have ye…