scholarly journals Effect of Antimony Buffer Layer on the Electric and Magnetic Properties of 200 and 600 nm Thick Bismuth Films on Mica Substrate

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2010
Author(s):  
Elena S. Makarova ◽  
Anastasiia S. Tukmakova ◽  
Anna V. Novotelnova ◽  
Vladimir A. Komarov ◽  
Vasilisa A. Gerega ◽  
...  

We report on the production of 200 and 600 nm thick Bi films on mica substrate with 10 nm thick Sb sublayer between Bi and mica. Two types of films have been studied: block and single crystal. Films were obtained using the thermal evaporation technique using continuous and discrete spraying. Discrete spraying allows smaller film blocks size: 2–6 μ m compared to 10–30 μ m, obtained by the continuous spraying. Single crystal films were made by the zone recrystallization method. Microscopic examination of Bi films with and without Sb sublayer did not reveal an essential distinction in crystal structure. A galvanomagnetic study shows that Sb sublayer results in the change of Bi films properties. Sb sublayer results in the increase of specific resistivity of block films and has no significant impact on single crystal films. For single-crystal films with Sb sublayer with a thickness of 200 nm the Hall coefficient has value 1.5 times higher than for the 600 nm thickness films at 77 K. The change of the Hall coefficient points to change of the contribution of carriers in the conductivity. This fact indicates a change in the energy band structure of the thin Bi film. The most significant impact of the Sb sublayer is on the magnetoresistance of single-crystal films at low temperatures. The increase of magnetoresistance points to the increase of mobility of the charge carriers. In case of detecting and sensing applications the increased carriers mobility can result in a faster device response time.

2015 ◽  
Vol 41 (1) ◽  
pp. 10-13 ◽  
Author(s):  
V. M. Grabov ◽  
V. A. Komarov ◽  
N. S. Kablukova ◽  
E. V. Demidov ◽  
A. N. Krushel’nitskii

2010 ◽  
Vol 470 ◽  
pp. S221-S222
Author(s):  
T.B. Charikova ◽  
N.G. Shelushinina ◽  
G.I. Harus ◽  
I.V. Karskanov ◽  
O.E. Sochinskaya ◽  
...  

2010 ◽  
Vol 168-169 ◽  
pp. 537-540
Author(s):  
T.B. Charikova ◽  
N.G. Shelushinina ◽  
G.I. Harus ◽  
D.S. Petukhov ◽  
O.E. Sochinskaya ◽  
...  

Magnetoresistivity and Hall effect measured in magnetic fields up to B=9T (B ║ c, J ║ ab) in electron-doped Nd2−xCexCuO4+δ single crystal films with x = 0.15 and different oxygen content (δ) were studied in a temperature range of 0.4-4.2 K. The resistivity and Hall coefficient behaviors in the mixed state are discussed in the framework of flux-flow model with the inclusion of the back-flow of vortices owing to the pinning forces.


Author(s):  
L. E. Murr ◽  
G. Wong

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.


2001 ◽  
Vol 27 (6) ◽  
pp. 451-453 ◽  
Author(s):  
S. S. Kucherenko ◽  
V. P. Pashchenko ◽  
P. I. Polyakov ◽  
S. I. Khartsev ◽  
V. A. Shtaba

Sign in / Sign up

Export Citation Format

Share Document