Multilayer Sequential Assembly of Thin Films That Display Room-Temperature Spin Crossover with Hysteresis

2006 ◽  
Vol 45 (35) ◽  
pp. 5786-5789 ◽  
Author(s):  
Saioa Cobo ◽  
Gábor Molnár ◽  
José Antonio Real ◽  
Azzedine Bousseksou
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Spin Crossover ◽  
Sequential Assembly

Multilayer Sequential Assembly of Thin Films That Display Room-Temperature Spin Crossover with Hysteresis

2006 ◽  
Vol 118 (35) ◽  
pp. 5918-5921 ◽  
Author(s):  
Saioa Cobo ◽  
Gábor Molnár ◽  
José Antonio Real ◽  
Azzedine Bousseksou
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Spin Crossover ◽  
Sequential Assembly

Room temperature current modulation in large area electronic junctions of spin crossover thin films

2018 ◽  
Vol 112 (1) ◽  
pp. 013301 ◽  
Author(s):  
Victoria Shalabaeva ◽  
Karl Ridier ◽  
Sylvain Rat ◽  
Maria D. Manrique-Juarez ◽  
Lionel Salmon ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Spin Crossover ◽  
Large Area ◽  
Current Modulation ◽  
Electronic Junctions

scholarly journals Room temperature control of spin states in a thin film of a photochromic iron(ii) complex

2018 ◽  
Vol 5 (3) ◽  
pp. 506-513 ◽  
Author(s):  
Lorenzo Poggini ◽  
Magdalena Milek ◽  
Giacomo Londi ◽  
Ahmad Naim ◽  
Giordano Poneti ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Temperature Control ◽  
Room Temperature ◽  
Spin Crossover ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Spin States ◽  
Molecular Spin

Thin films of a molecular spin crossover iron(ii) complex featuring a photochromic diarylethene-based ligand have been grown by sublimation in ultra-high vacuum on Au(111) and investigated by photoelectron spectroscopies.

scholarly journals Indications of magnetic coupling effects in spin cross-over molecular thin films

2018 ◽  
Vol 54 (8) ◽  
pp. 944-947 ◽  
Author(s):  
Xin Zhang ◽  
Alpha T. N'Diaye ◽  
Xuanyuan Jiang ◽  
Xiaozhe Zhang ◽  
Yuewei Yin ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Fields ◽  
Room Temperature ◽  
Spin Crossover ◽  
Magnetic Coupling ◽  
Coupling Effects ◽  
Molecular Thin Films

Room temperature isothermal reversible spin crossover switching of [Fe(H2B(pz)2)2(bipy)] thin films by external magnetic fields is demonstrated.

scholarly journals Room temperature dielectric bistability in solution-processed spin crossover polymer thin films

2016 ◽  
Vol 4 (26) ◽  
pp. 6240-6248 ◽  
Author(s):  
Gianluca Bovo ◽  
Irene Bräunlich ◽  
Walter R. Caseri ◽  
Natalie Stingelin ◽  
Thomas D. Anthopoulos ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Spin Crossover ◽  
Polymer Thin Films ◽  
Solution Processed ◽  
Electrical Studies ◽  
Spin Switching

Optical and electrical studies reveal spin switching bistability from polymer thin films.

Studies on Water in the Hydration Chamber of a Modified Electron Microscope

1970 ◽  
Vol 28 ◽  
pp. 544-545
Author(s):  
R. C. Moretz ◽  
G. G. Hausner ◽  
D. F. Parsons
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electron Microscope ◽  
Steady State ◽  
Room Temperature ◽  
Small Mass ◽  
Equilibrium Pressure ◽  
Biological Objects ◽  
Mechanical Pump ◽  
Differential Pumping

Use of the electron microscope to examine wet objects is possible due to the small mass thickness of the equilibrium pressure of water vapor at room temperature. Previous attempts to examine hydrated biological objects and water itself used a chamber consisting of two small apertures sealed by two thin films. Extensive work in our laboratory showed that such films have an 80% failure rate when wet. Using the principle of differential pumping of the microscope column, we can use open apertures in place of thin film windows.Fig. 1 shows the modified Siemens la specimen chamber with the connections to the water supply and the auxiliary pumping station. A mechanical pump is connected to the vapor supply via a 100μ aperture to maintain steady-state conditions.

Interactions Between Al and Cr Thin Films

1976 ◽  
Vol 34 ◽  
pp. 638-639
Author(s):  
R. M. Anderson ◽  
T. M. Reith ◽  
M. J. Sullivan ◽  
E. K. Brandis
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Vacuum System ◽  
Processing Temperature ◽  
Diffusion Couples ◽  
Electronic Circuits ◽  
Intermetallic Formation ◽  
Si Substrates ◽  
Aluminum Silicon

Thin films of aluminum or aluminum-silicon can be used in conjunction with thin films of chromium in integrated electronic circuits. For some applications, these films exhibit undesirable reactions; in particular, intermetallic formation below 500 C must be inhibited or prevented. The Al films, being the principal current carriers in interconnective metal applications, are usually much thicker than the Cr; so one might expect Al-rich intermetallics to form when the processing temperature goes out of control. Unfortunately, the JCPDS and the literature do not contain enough data on the Al-rich phases CrAl7 and Cr2Al11, and the determination of these data was a secondary aim of this work.To define a matrix of Cr-Al diffusion couples, Cr-Al films were deposited with two sets of variables: Al or Al-Si, and broken vacuum or single pumpdown. All films were deposited on 2-1/4-inch thermally oxidized Si substrates. A 500-Å layer of Cr was deposited at 120 Å/min on substrates at room temperature, in a vacuum system that had been pumped to 2 x 10-6 Torr. Then, with or without vacuum break, a 1000-Å layer of Al or Al-Si was deposited at 35 Å/s, with the substrates still at room temperature.

Investigation of ultra-thin films of YBa2Cu3O7−δ grown on MgO

1990 ◽  
Vol 48 (4) ◽  
pp. 6-7
Author(s):  
S.K. Streiffer ◽  
C.B. Eom ◽  
J.C. Bravman ◽  
T.H. Geballet
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Deposition Process ◽  
Nucleation And Growth ◽  
Multilayer Structures ◽  
Rf Power ◽  
Oxygen Loss ◽  
Transmission Electron ◽  
Single Target ◽  
Mtorr Argon

The study of very thin (<15 nm) YBa2Cu3O7−δ (YBCO) films is necessary both for investigating the nucleation and growth of films of this material and for achieving a better understanding of multilayer structures incorporating such thin YBCO regions. We have used transmission electron microscopy to examine ultra-thin films grown on MgO substrates by single-target, off-axis magnetron sputtering; details of the deposition process have been reported elsewhere. Briefly, polished MgO substrates were attached to a block placed at 90° to the sputtering target and heated to 650 °C. The sputtering was performed in 10 mtorr oxygen and 40 mtorr argon with an rf power of 125 watts. After deposition, the chamber was vented to 500 torr oxygen and allowed to cool to room temperature. Because of YBCO’s susceptibility to environmental degradation and oxygen loss, the technique of Xi, et al. was followed and a protective overlayer of amorphous YBCO was deposited on the just-grown films.

TEM sample preparation of wear-tested room-temperature pulsed-laser-deposited thin films of MoS2 by ultramicrotomy

1993 ◽  
Vol 51 ◽  
pp. 1118-1119
Author(s):  
Pamela F. Lloyd ◽  
Scott D. Walck
Keyword(s):  
Thin Films ◽  
Sample Preparation ◽  
Room Temperature ◽  
High Vacuum ◽  
Pulsed Laser ◽  
Ultra High Vacuum ◽  
Wear Testing ◽  
Preparation Technique ◽  
Cross Sectional ◽  
Aerospace Applications

Pulsed laser deposition (PLD) is a novel technique for the deposition of tribological thin films. MoS2 is the archetypical solid lubricant material for aerospace applications. It provides a low coefficient of friction from cryogenic temperatures to about 350°C and can be used in ultra high vacuum environments. The TEM is ideally suited for studying the microstructural and tribo-chemical changes that occur during wear. The normal cross sectional TEM sample preparation method does not work well because the material’s lubricity causes the sandwich to separate. Walck et al. deposited MoS2 through a mesh mask which gave suitable results for as-deposited films, but the discontinuous nature of the film is unsuitable for wear-testing. To investigate wear-tested, room temperature (RT) PLD MoS2 films, the sample preparation technique of Heuer and Howitt was adapted.Two 300 run thick films were deposited on single crystal NaCl substrates. One was wear-tested on a ball-on-disk tribometer using a 30 gm load at 150 rpm for one minute, and subsequently coated with a heavy layer of evaporated gold.

Interface motion during recrystallization of amorphous NiSi2

1990 ◽  
Vol 48 (4) ◽  
pp. 524-525
Author(s):  
J. L. Batstone ◽  
D.A. Smith
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Amorphous Film ◽  
Nucleation And Growth ◽  
Recrystallization Process ◽  
Amorphous Films ◽  
Interface Motion ◽  
Si Substrates ◽  
Spherical Caps ◽  
Crystal Interfaces

Recrystallization of amorphous NiSi2 involves nucleation and growth processes which can be studied dynamically in the electron microscope. Previous studies have shown thatCoSi2 recrystallises by nucleating spherical caps which then grow with a constant radial velocity. Coalescence results in the formation of hyperbolic grain boundaries. Nucleation of the isostructural NiSi2 results in small, approximately round grains with very rough amorphous/crystal interfaces. In this paper we show that the morphology of the rccrystallizcd film is dramatically affected by variations in the stoichiometry of the amorphous film.Thin films of NiSi2 were prepared by c-bcam deposition of Ni and Si onto Si3N4, windows supported by Si substrates at room temperature. The base pressure prior to deposition was 6 × 107 torr. In order to investigate the effect of stoichiomctry on the recrystallization process, the Ni/Si ratio was varied in the range NiSi1.8-2.4. The composition of the amorphous films was determined by Rutherford Backscattering.

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