Room temperature ferromagnetic properties of epitaxial (111) Y0.225Sr0.775CoO3− thin film grown on single crystalline (111) MgO substrate

Room temperature ferromagnetism (FM) of these thin film samples are highly tuneable by the simultaneous presence of CuO nanophases and multivalent Cu and Vö concentrations.

Download Full-text

Effects of Room Temperature Heavy-Ion Irradiation on Magnetic and Electrical Properties of a Single Crystalline Iron Thin Film

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.maw200907 ◽

2009 ◽

Vol 50 (9) ◽

pp. 2134-2138 ◽

Cited By ~ 5

Author(s):

Yasuhiro Kamada ◽

Hideo Watanabe ◽

Seiji Mitani ◽

Jun-ichi Echigoya ◽

Hiroaki Kikuchi ◽

...

Keyword(s):

Thin Film ◽

Electrical Properties ◽

Room Temperature ◽

Ion Irradiation ◽

Heavy Ion ◽

Single Crystalline ◽

Heavy Ion Irradiation ◽

Magnetic And Electrical Properties

Download Full-text

Synthesis and room-temperature ferromagnetic properties of single-crystalline Co-doped SnO2 nanocrystals via a high magnetic field

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2009.03.122 ◽

2009 ◽

Vol 481 (1-2) ◽

pp. 837-840 ◽

Cited By ~ 17

Author(s):

Yongbin Xu ◽

Yongjun Tang ◽

Chuanjun Li ◽

Guanghui Cao ◽

Weili Ren ◽

...

Keyword(s):

Magnetic Field ◽

High Magnetic Field ◽

Room Temperature ◽

Single Crystalline ◽

Ferromagnetic Properties ◽

Sno2 Nanocrystals ◽

Co Doped

Download Full-text

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

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100069715 ◽

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.

Download Full-text

Warm and freeze-fracture of cotton seed radicles

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100129206 ◽

1987 ◽

Vol 45 ◽

pp. 984-985

Author(s):

E. L. Vigil ◽

E. F. Erbe

Keyword(s):

Thin Film ◽

Water Vapor ◽

Fracture Surface ◽

Membrane Structure ◽

Room Temperature ◽

Freeze Fracture ◽

Longitudinal Axis ◽

Fracture Plane ◽

Cotton Seeds ◽

Condensed Water

In cotton seeds the radicle has 12% moisture content which makes it possible to prepare freeze-fracture replicas without fixation or cryoprotection. For this study we have examined replicas of unfixed radicle tissue fractured at room temperature to obtain data on organelle and membrane structure.Excised radicles from seeds of cotton (Gossyplum hirsutum L. M-8) were fractured at room temperature along the longitudinal axis. The fracture was initiated by spliting the basal end of the excised radicle with a razor. This procedure produced a fracture through the tissue along an unknown fracture plane. The warm fractured radicle halves were placed on a thin film of 100% glycerol on a flat brass cap with fracture surface up. The cap was rapidly plunged into liquid nitrogen and transferred to a freeze- etch unit. The sample was etched for 3 min at -95°C to remove any condensed water vapor and then cooled to -150°C for platinum/carbon evaporation.

Download Full-text

Electron Microscopy Studies of The Chemistry And Microstructure of BaF2 / YBa2Cu3O7-x Thin Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100171717 ◽

1994 ◽

Vol 52 ◽

pp. 796-797

Author(s):

J. L. Lee ◽

C. A. Weiss ◽

R. A. Buhrman ◽

J. Silcox

Keyword(s):

Thin Film ◽

Electron Microscopy ◽

Thin Films ◽

Scanning Transmission Electron Microscope ◽

Atomic Scale ◽

Island Growth ◽

Multilayer Systems ◽

Transmission Electron ◽

Scanning Transmission ◽

Mgo Substrate

BaF2 thin films are being investigated as candidates for use in YBa2Cu3O7-x (YBCO) / BaF2 thin film multilayer systems, given the favorable dielectric properties of BaF2. In this study, the microstructural and chemical compatibility of BaF2 thin films with YBCO thin films is examined using transmission electron microscopy and microanalysis. The specimen was prepared by using laser ablation to first deposit an approximately 2500 Å thick (0 0 1) YBCO thin film onto a (0 0 1) MgO substrate. An approximately 7500 Å thick (0 0 1) BaF2 thin film was subsequendy thermally evaporated onto the YBCO film.Images from a VG HB501A UHV scanning transmission electron microscope (STEM) operating at 100 kV show that the thickness of the BaF2 film is rather uniform, with the BaF2/YBCO interface being quite flat. Relatively few intrinsic defects, such as hillocks and depressions, were evident in the BaF2 film. Moreover, the hillocks and depressions appear to be faceted along {111} planes, suggesting that the surface is smooth and well-ordered on an atomic scale and that an island growth mechanism is involved in the evolution of the BaF2 film.

Download Full-text