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6 Sep 1999

Volume 75, Issue 10, pp. 1345-1481

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Switching behavior of epitaxial perovskite manganite thin films

H. Oshima, K. Miyano, Y. Konishi, M. Kawasaki, and Y. Tokura

Appl. Phys. Lett. 75, 1473 (1999); http://dx.doi.org/10.1063/1.124729 (3 pages) | Cited 37 times

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We have observed electric-field-induced and photoinduced switching from insulating to conducting state in stressed epitaxial Sm0.5Sr0.5MnO3 thin films fabricated by pulsed-laser deposition. Previously known only in bulk crystals of perovskite manganese oxides, the switching behavior in thin film form is more significant for potential practical utility of the strongly correlated electron systems including optical devices. © 1999 American Institute of Physics.
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72.60.+g Mixed conductivity and conductivity transitions
71.27.+a Strongly correlated electron systems; heavy fermions
73.50.Pz Photoconduction and photovoltaic effects
73.61.Ng Insulators

High speed patterning of a metal silicide using scanned probe lithography

E. S. Snow, P. M. Campbell, and F. K. Perkins

Appl. Phys. Lett. 75, 1476 (1999); http://dx.doi.org/10.1063/1.124730 (3 pages) | Cited 12 times

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We describe a simple high-speed process for patterning metal silicides with an atomic force microscope (AFM). The process uses a thin AFM-generated oxide to block Pt diffusion during the formation of Pt silicide. Because the process requires only ∼1 nm of oxide, high write speeds and fine lateral resolution are achieved. We find that by maintaining ambient moisture at the tip–sample interface we can under optimal tip conditions achieve a minimum exposure time of ∼300 ns for a 30 nm size pixel which corresponds to a maximum write speed of ∼10 cm/s. © 1999 American Institute of Physics.
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85.40.Hp Lithography, masks and pattern transfer
68.37.Ef Scanning tunneling microscopy (including chemistry induced with STM)
68.37.Ps Atomic force microscopy (AFM)
68.37.Rt Magnetic force microscopy (MFM)
68.37.Uv Near-field scanning microscopy and spectroscopy
68.35.Fx Diffusion; interface formation
81.07.-b Nanoscale materials and structures: fabrication and characterization
81.16.-c Methods of micro- and nanofabrication and processing
85.35.-p Nanoelectronic devices

Ejection of ferrofluid grains using nonlinear acoustic impulses— A particle dynamical study

Surajit Sen, Marian Manciu, and Felicia S. Manciu

Appl. Phys. Lett. 75, 1479 (1999); http://dx.doi.org/10.1063/1.124731 (3 pages) | Cited 8 times

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We consider a model dilute ferrofluid with the grains suspended in water (e.g.,γ-Fe2O3) and subject the system to a strong, homogeneous magnetic field directed perpendicular to the surface such that there is chain formation along the field direction. We show that an appropriate impulse initiated at the base of the container might travel as a nondispersive soliton pulse with sufficient energy to overcome surface tension and eject the ferrofluid grain nearest to the liquid–air interface. The proposed mechanism, if successfully realized in the laboratory, could help design a nozzle-free, ink-jet printer of unparalleled resolution. © 1999 American Institute of Physics.
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75.50.Mm Magnetic liquids
43.35.Rw Magnetoacoustic effect; oscillations and resonance
75.80.+q Magnetomechanical effects, magnetostriction
43.25.Rq Solitons, chaos
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