Papers

Year 2009

 J. J. Henderson, C. Koo, P. L. Feng, Enrique del Barco, Stephen Hill, I. S. Tupitsyn, P. C. E. Stamp and David N. Hendrickson “Manifestation of Spin Selection Rules on the Quantum Tunneling of Magnetization in a Single-Molecule Magnet”
Phys. Rev. Lett. 103, 017202 (2009)

 Enrique del Barco, Stephen Hill, and David N. Hendrickson
“Comment on Influence of the Dzyaloshinskii-Moriya Exchange Interaction on Quantum Phase Interference of Spins”
Phys. Rev. Lett. In press (2009)

 Patrick L. Feng, Changhyun Koo, John Henderson, Paul Manning, Motohiro Nakano, Enrique del Barco, Stephen Hill, and David N. Hendrickson
“Nanomodulation of Molecular Nanomagnets”
Inorg. Chem. 48, 3480-3492 (2009)

Year 2008

J.J. Henderson, C. M. Ramsey, E. del Barco, S. Datta, S. Hill, T. C. Stamatatos and G. Christou
“Control of the ininhomogeneity degree by magnetic dilution in crystals of antiferromagnetic molecular rings”
Phys. Rev. B 78, 214413 (2008)

Sonali J. Shah, Christopher M. Ramsey, Katie J. Heroux, Antonio G. DiPasquale, Naresh S. Dalal, Arnold L. Rheingold, Enrique del Barco, and David N. Hendrickson
“Molecular Wheels: New Mn₁₂ complexes as Single Molecule Magnets”
Inorg. Chem.47, 9569-9582 (2008)

R. E. Peale, O. Lopatiuk, J. Cleary, S. Santos, J. Henderson, L. Chernyak, D. Clark, T. A. Winningham, E. del Barco, H. Heinrich and W. R. Buchwald
“Propagation of high-frequency surface plasmons on gold”
J. Opt. Soc. Am. B 25, 1708 (2008)

R. E. Peale, O. Lopatiuk, J. Cleary, S. Santos, J. Henderson, D. Clark, L. Chernyak, T. A. Winningham, E. Del Barco, H. Heinrich, W. R. Buchwald
“Propagation and out-coupling of electron-beam excited surface plasmons on gold”
Functional Plasmonics and Nanophotonics, edited by S. Maier and S. Kawata, MRS Proceedings Volume 1077E (Electronic content only), Proc. Mat. Res. Soc. 1077-L01-02 (MRS Spring meeting, San Franscisco CA March 25, 2008)

C. C. Beedle, T. Sayles, J. J. Henderson, E. del Barco, K. Heroux, M. Nakano, J. O’Brien, M. B. Maple and D. N. Hendrickson
“Heat Capacity Studies of Field-Dependent Magnetic Ordering in Ni₄II Single-Molecule Magnets”
Submitted to Inorg. Chem. (2008)

Patrick L. Feng, Changhyun Koo, John J. Henderson, Motohiro Nakano, Stephen, Hill, Enrique del Barco, and David N. Hendrickson
“Single-Molecule-Magnet Behavior and Spin Changes Affected by Crystal Packing Effects”
Inorg. Chem.(Communication) 47, 8610-8612 (2008)

J. J. Henderson, C. M. Ramsey, H. M. Quddusi and E. del Barco
“High-Frequency Microstrip Cross Resonators for Circular Polarization EPR Spectroscopy”
Rev. Sci. Instrum. 79, 074704 (2008)

S. J. Shah, C. M. Ramsey, K. J. Heroux, J. R. O’Brien, A. G. DiPasquale, A. L. Rheingold, E. del Barco and D. N. Hendrickson
 “Wheel-shaped Mn₁₆ single-molecule magnets”
Inorg. Chem. 47, 6245 (2008)

J. C. Gonzalez-Pons, J. J. Henderson, E. del Barco and B. Oezylmaz
“Magnetoresistance and ferromagnetic resonance studies of Pd_0.4Ni_0.6 nanowires and extended thin films”
Phys. Rev. B 78, 012408 (2008)

H.M. Quddusi, C.M. Ramsey, J. C. Gonzalez-Pons, J. J. Henderson, E. del Barco, G. de Loubens and A. D. Kent
“On-chip Integration of High-Frequency Electron Paramagnetic Resonance Spectroscopy and Hall-Effect Magnetometry”
Rev. Sci. Instrum.79, 074703 (2008)

C. M. Ramsey, E. del Barco, S. Hill, S. J. Shah, C. C. Beedle and D. N. Hendrickson
"Quantum interference of tunnel trajectories between states of different spin length in a dimeric molecular nanomagnet"
Nature Physics 4, 277-281 (2008) doi:10.1038/nphys886

L. Chow, J. C. Gonzalez-Pons, E. del Barco, R. Vanfleet, A. Misiuk, A. Barcz, E. S. Choi and G. Chai
"Structures and magnetization of defect-associated sites in silicon"
CP1003, Magnetic Materials, International Conference on Magnetic Materials (ICMM-2007), edited by A. Ghoshray and B. Bandyopadhyay, AIP, 248 (2008)

L. Chow, J. C. Gonzalez-Pons, E. del Barco, R. Vanfleet, A. Misiuk, A. Barcz, M. Prujszczyk, A. Shunmugavela and G. Chai
"Diffusion profiles and magnetic properties of Mn-implanted silicon after thermal annealing"
J. Mater. Sci.: Mater. Electron 19, 263-268 (2008).

Year 2007
J. J. Henderson, C. M. Ramsey, E. del Barco, A. Mishra and G. Christou
"Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule magnets"
J. Appl. Phys. 101, 09E104 (2007). (4 pages - 246kB)

G. de Loubens, G. D. Chaves, A. D. Kent, C. M. Ramsey, E. del Barco, C. Beedle, and D. N. Hendrickson
"Magnetization and EPR studies of the single molecule magnet Ni₄ with integrated sensors"
J. Appl. Phys. 101, 09E104 (2007). (4 pages - 277kB)

Year 2006
It was not a very productive year with the move to UCF.

Year 2005
Enrique del Barco, Andrew D. Kent, En-Che Yang and David N. Hendrickson
"Magnetic and Microwave Studies of High Spin States of Single-Molecule Magnet Ni₄"
Polyhedron 24, 2695 (2005). (6 pages - 290kB)

Steve Isaacman, Rajeev Kumar, Enrique del Barco, Andrew D. Kent, James Canary and Alexej Jerschow
"Critical Examination of Fe₈ as Contrast Agent for Magnetic Resonance Imaging"
Polyhedron 24, 2691 (2005). (4 pages - 168kB)

Kyungwha Park, Mark R. Pederson, Tunna Baruah, Noam Bernstein, Jens Kortus, Steven, L. Richardson, Enrique del Barco, Andrew D. Kent, Steve Hill, and Naresh S. Dalal
"Incommensurate Transverse Anisotropy Induced by Disorder and Spin-Orbit-Vibron Coupling in Mn₁₂-acetate"
J. Appl. Phys. 97, 10M505 (2005). (3 pages - 106kB)

Evan M. Rumberger, Enrique del Barco, Jon Lawrence, Stephen Hill, Andrew D. Kent,  Lev N. Zakharov, Arnold L. Rheingold and David N. Hendrickson
"Fast Tunneling Jahn-Teller Isomer of the [Mn₁₂O₁₂(O₂CC₆H₄-2-CH₃)₁₆(H₂O)₄]·S Single-molecule Magnet"
Polyhedron 24, 2557 (2005). (5 pages - 318kB)

S. Hill, N. Anderson, A. Wilson, S. Takahashi, K. Petukhov, N. E. Chakov, M. Murugesu, J. M. North, E. del Barco, A. D. Kent, N. S Dalal, and G. Christou
"A comparison between high-symmetry Mn₁₂ single-molecule magnets in different ligand/solvent environments"
Polyhedron 24, 2284 (2005). (9 pages - 2MB)

Year 2004
E. del Barco, A. D. Kent, E. C. Yang and D. N. Hendrikson
"Quantum Superposition of High-Spin States in Single Molecule Magnet Ni₄"
Phys. Rev. Lett. 93, 157202 (2004). (4 pages - 900kB)

A. D. Kent, B. Ozeymalz and E. del Barco.
"Current induced ultra-fast switching of the magnetization in a spin-transfer device "
Appl. Phys. Lett., 84, 3897 (2004). (3 pages - 91kB)

E. del Barco, A. D. Kent, E. Rumberger, D. N. Hendrikson and G. Christou.
"Observation of a Distribution of Internal Transverse Fields in a Mn12-based Single Molecule Magnet"
Phys. Rev. B69 (RC), 020411 (2004). (4 pages - 320kB)

Year 2003
E. del Barco, A. D. Kent, E. Rumberger, D. N. Hendrikson and G. Christou.
"Symmetry of Magnetic Quantum Tunneling in Single Molecule Magnet Mn12-Acetate"
Phys. Rev. Lett. 91, 047203 (2003). (4 pages - 142kB)
 

Year 2002
E. del Barco, A. D. Kent, E. Rumberger, D. N. Hendrikson and G. Christou.
"Tunneling splittings in Mn12-acetate single crystals"
Europhys. Lett. 60, 768 (2002). (7 pages - 159kB)

E. del Barco, R. Amigo, J. Tejada, I. Rutel, J. Brooks and N. Dalal.
"Quadratic order anisotropy term due to dislocations in Mn12-acetate directly observed by EPR experiments"
Phys. Rev. B65, 172403 (2002). (4 pages - 142kB)

M. Duran, E. del Barco, J.M. Hernandez, and J. Tejada.
"Relaxation and Landau-Zener experiments down to 100 mK in ferritin"
Phys. Rev.B65, 172401 (2002). (4 pages - 65kB)

E. del Barco, M. Duran, J. M. Hernandez, J Tejada, R. D. Zysler, M. Vasquez-Mansilla, and D. Fiorani.
"Magnetic relaxation measurements of alfa-Fe2O3 antiferromagnetic particles below 1 K"
Phys. Rev. B65, 52404 (2002). (4 pages - 63kB)

A.Garcia, E. del Barco, J.M.Hernandez, J.M.Broto, H. Rakoto and J.Tejada.
"Anomalous remanence magnetization in HTSC"
Physica C. 371, 27 (2002).

Year 2001
J. Tejada, E. M. Chudnovsky, E. del Barco, J. M. Hernandez and J. Spiler.
"Magnetic qubits as hardware for Quantum computing"
Nanotechnology 12, 181 (2001). (6 pages - 126kB)

E. del Barco, J. Asenjo, X. X. Zhang, R. Pieczynski, A. Julià, J. Tejada, R. F. Ziolo, D. Fiorani, and A. M. Testa.
"Free rotation of magnetic nanoparticles in solid media"
Chem. Mater. 13, 1487 (2001). (4 pages - 52kB)
 

Year 2000
J. Tejada, E. M. Chudnovsky, E. del Barco, J. M. Hernandez and J. Spiler.
"Magnetic qubits as hardware for Quantum computing"
Hewlett Packard International Technical Report (2000).

E. del Barco, J. M. Hernandez, J. Tejada, N. Biskup, R. Achey, I. Rutel, N. Dalal, and J. Brooks.
"High frequency Resonance experiments on Fe-8 molecular clusters"
Phys. Rev. B62, 3018 (2000). (4 pages - 81kB)

Year 1999
J.M.Hernandez, J.Tejada, E.del Barco, N.Vernier, G.Bellessa and E.M.Chudnovsky.
"Mesoscopic Spin Quantum Coherence"
Statistical and dynamical aspects of mesoscopic systems: Proceedings of the XVI Sitges Conference on Statistical Mechanics. Ed. D. Reguera, G. Platero, L. L. Bonilla, and J. M. Rubí. Springer, 226 (1999).

E. del Barco, N.Vernier, J.M.Hernandez, J.Tejada, E.M.Chudnovsky, E.Molins and G.Bellesa.
"Mesoscopic Quantum Coherence in High-spin molecules"
Europhys. Lett. 47, 722 (1999). (7 pages - 222kB)

J.Tejada, J.M.Hernandez, E.del Barco, X.X.Zhang.
"Quantum tunneling of the magnetic moment"
Contributions to Science, 1(1) : 1-30 (1999)

J.Tejada, J. M. Hernandez and E. del Barco.
"Macroscopic Quantum Tunneling of the magnetic moment"
J. Magn. Magn. Mater. 196-197, 552-557 (1999).

X. Bohigas, E. del Barco, M. Sales and J. Tejada.
"Magnetocaloric effect in Ceramic Perovskytes"
J. Magn. Magn. Mater. 196-197, 155-157 (1999).

X. X. Zhang, J. M. Hernandez, E. del Barco, J. Tejada, A. Roig, E. Molins, K. Wieghardt.
"Thermaly Assistant Resonant Quantum Tunneling of Magnetization in Fe-8 Clusters"
J. Appl. Phys. 85. 5633-5635 (1999).

E. del Barco, J. M. Hernandez, M. Sales, J. Tejada, E. M. Chudnovsky, J. M. Broto and H. Rakoto.
"Spin-phonon avalanches in Mn-12 acetate"
Phys. Rev. B60, 11898-11901 (1999). (4 pages - 73kB)

Year 1998
X. Bohigas, E. del Barco, X. X. Zhang, M. Sales, J. Tejada.
"Tunable magnetocaloric effect in ceramic Perovskites"
Appl. Phys. Lett. 73, 390-392 (1998).  (3 pages - 75kB)

J. Tejada, X. X. Zhang, E. del Barco, J. M. Hernandez and E. M. Chudnovsky.
Comment on 'Macroscopic Resonant Tunneling of Magnetization in Ferritin'
Phys. Rev. Lett. 81, 736 (1998).  (1 pages - 43kB)

E. del Barco, F. Luis, J. Tejada, X. X. Zhang, J. Bartolome, J. M. Hernandez and E. M. Chudnovsky.
"Experimental evidence of Macroscopic Resonant Tunneling of magnetization in antiferromagnetic ferritin"
J. Appl. Phys. 83. 6934-6936 (1998).

Year 1997
J.Tejada, X.X.Zhang, E.del Barco, J.M.Hernandez and E.M.Chudnovsky.
"Macroscopic Resonant Tunneling of Magnetization in Ferritin"
Phys. Rev. Lett. 79. 1754 (1997). (4 pages - 142kB)