Recently, studies of the structures with the spin-tunnel magnetoresistance effect attract a particular interest. The use of the elements based on tunnel magnetoresistance will allow to create new devices for spintronics, increase the recording density and the speed of information read-out

Saltykov, D.I.

English

SocioEconomic Challenges Journal (Sumy State University)

2 
 
МІНІСТЕРСТВО ОСВІТИ І НАУКИ УКРАЇНИ 
СУМСЬКИЙ ДЕРЖАВНИЙ УНІВЕРСИТЕТ 
ФАКУЛЬТЕТ ІНОЗЕМНОЇ ФІЛОЛОГІЇ 
ТА СОЦІАЛЬНИХ КОМУНІКАЦІЙ 
 
 
 
 
 
 
 
 
 
СОЦІАЛЬНО-ГУМАНІТАРНІ 
АСПЕКТИ РОЗВИТКУ СУЧАСНОГО 
СУСПІЛЬСТВА 
 
 
МАТЕРІАЛИ V ВСЕУКРАЇНСЬКОЇ НАУКОВОЇ КОНФЕРЕНЦІЇ СТУДЕНТІВ, 
АСПІРАНТІВ, ВИКЛАДАЧІВ ТА СПІВРОБІТНИКІВ 
 
 
(Суми, 20-21 квітня 2017 року)  
 
 
 
 
 
 
 
 
 
 
 
Суми 
2017 
138 
 
resources, size and personnel loading, etc., identify missing and duplicate 
processes and make appropriate adjustments, define the functions of each 
unit, establish relationships between units and their functions. 
 
 
INFLUENCE OF ANNEALING TEMPERATURE  
ON MAGNETORESISTANCE OF ULTRATHIN  
FE AND CO FILMS 
 
D. I. Saltykov – Sumy State University, group PhD- 62 
A. M. Dyadechko – E L Adviser 
Recently, studies of the structures with the spin-tunnel 
magnetoresistance effect attract a particular interest. The use of the 
elements based on tunnel magnetoresistance will allow to create new 
devices for spintronics, increase the recording density and the speed of 
information read-out. 
The structures of tunnel magnetoresistance include ultrathin films of 
ferromagnetic metals and alloys. In such samples the features of 
magnetoresistance are caused by the presence of island structure. 
The purpose of the study is to establish the influence of annealing 
temperature and size effects on the value of tunnel magnetoresistance of the 
island films of iron and cobalt. 
As a result of experiments the single-layer Co and Fe films (1-
30) nm thick were obtained in the vacuum chamber at the pressure of 
residual atmosphere 10 
–4
 Pa. The film condensation was carried out by 
evaporation of metals with purity not less than 99.98% using the electron-
beam gun. The thickness was controlled by the quartz resonator method.  
Measurements of the magnetoresistance and thermomagnetic 
treatment of the films were carried out in a special device under the 
conditions of ultrahigh oil-free vacuum (10
 – 6
  10 – 7) Pa in the temperature 
range from 150 to 700 K. 
The tunnel magnetoresistance was implemented for the freshly 
condensed Co and Fe films in the thickness range of dco= 5-25 nm and dFe= 7-
30 nm. The maximum value of ТМR at room temperature was 1% for the fresh 
condensed films (dFe = 17 nm) and Fe films annealed at the temperature of 520 
K (dFe = 8 nm). Annealing of Co films in the range of effective thickness of 15-
25 nm at the temperature of 700 K led to the emergence of anisotropic 
magnetoresistance. The annealing did not change the type of 
magnetoresistance for Fe films, although its value decreased to 0.1%. 


Influence of annealing temperature on magnetoresistance of ultrathin  Fe and Co films

https://essuir.sumdu.edu.ua/bitstream/123456789/65213/1/Saltykov_magnetoresistance.pdf

Influence of annealing temperature on magnetoresistance of ultrathin Fe and Co films

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SocioEconomic Challenges Journal (Sumy State University)