50 research outputs found
ΠΠΈΠ½Π°ΠΌΠΈΠΊΠ° Π±Π°ΡΠΎΠΊΠ»ΠΈΠ½Π½ΡΡ Π²ΠΈΡ ΡΠ΅ΠΉ Ρ Π½ΡΠ»Π΅Π²ΠΎΠΉ ΡΡΠΌΠΌΠ°ΡΠ½ΠΎΠΉ ΠΈΠ½ΡΠ΅Π½ΡΠΈΠ²Π½ΠΎΡΡΡΡ (Ρ Π΅ΡΠΎΠ½ΠΎΠ²)
ΠΡΠΈΠ²ΠΎΠ΄ΠΈΡΡΡ ΠΎΠ±Π·ΠΎΡ ΡΠ°Π±ΠΎΡ, ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π½ΡΡ
ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΡΠ²ΠΎΠΉΡΡΠ² Π²ΠΈΡ
ΡΠ΅Π²ΡΡ
Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΉ Π² ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎ ΡΡΡΠ°ΡΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΠΎΠΉ Π±ΡΡΡΡΠΎ Π²ΡΠ°ΡΠ°ΡΡΠ΅ΠΉΡΡ ΠΆΠΈΠ΄ΠΊΠΎΡΡΠΈ ΠΈ ΠΎΠΏΠΈΡΡΠ²Π°Π΅ΠΌΡΡ
ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ΠΌ ΡΠ²ΠΎΠ»ΡΡΠΈΠΈ ΠΏΠΎΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ Π²ΠΈΡ
ΡΡ Π² ΠΊΠ²Π°Π·ΠΈΠ³Π΅ΠΎΡΡΡΠΎΡΠΈΡΠ΅ΡΠΊΠΎΠΌ ΠΏΡΠΈΠ±Π»ΠΈΠΆΠ΅Π½ΠΈΠΈ. ΠΡΠ½ΠΎΠ²Π½ΠΎΠ΅ Π²Π½ΠΈΠΌΠ°Π½ΠΈΠ΅ ΡΠ΄Π΅Π»Π΅Π½ΠΎ Π²ΠΈΡ
ΡΡΠΌ Ρ Π½ΡΠ»Π΅Π²ΠΎΠΉ ΡΡΠΌΠΌΠ°ΡΠ½ΠΎΠΉ ΡΠΈΡΠΊΡΠ»ΡΡΠΈΠ΅ΠΉ β ΡΠ°ΠΊ Π½Π°Π·ΡΠ²Π°Π΅ΠΌΡΠΌ Ρ
Π΅ΡΠΎΠ½Π°ΠΌ. Π Π°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°ΡΡΡΡ Π·Π°Π΄Π°ΡΠΈ ΡΠ°ΠΌΠΎΠ΄Π²ΠΈΠΆΠ΅Π½ΠΈΡ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΡΡ
Ρ
Π΅ΡΠΎΠ½ΠΎΠ², ΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΡΡΠΈ Π΅Π΄ΠΈΠ½ΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Π½ΠΎΠ³ΠΎ Ρ
Π΅ΡΠΎΠ½Π°, Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ Π΄Π²ΡΡ
Ρ
Π΅ΡΠΎΠ½ΠΎΠ² ΠΊΠΎΠ½Π΅ΡΠ½ΡΡ
ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ². ΠΡΠΈΠ²ΠΎΠ΄ΡΡΡΡ ΡΠ°ΠΊΠΆΠ΅ Π½ΠΎΠ²ΡΠ΅ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π·Π°Π΄Π°Ρ ΠΎ ΡΡΠ΅Ρ
ΠΈ Π±ΠΎΠ»Π΅Π΅ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΡΡ
Π²ΠΈΡ
ΡΡΡ
Ρ
Π΅ΡΠΎΠ½Π½ΠΎΠΉ ΡΡΡΡΠΊΡΡΡΡ. ΠΠ°ΡΡΡΡ ΠΏΡΠΈΠΌΠ΅ΡΡ Π²ΠΎΠ·Π½ΠΈΠΊΠ½ΠΎΠ²Π΅Π½ΠΈΡ Ρ
Π°ΠΎΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΠΆΠΈΠΌΠΎΠ². ΠΠ±ΡΡΠΆΠ΄Π°ΡΡΡΡ ΠΎΠ±Π»Π°ΡΡΡ ΠΏΡΠΈΠΌΠ΅Π½ΠΈΠΌΠΎΡΡΠΈ Ρ
Π΅ΡΠΎΠ½Π½ΠΎΠΉ ΡΠ΅ΠΎΡΠΈΠΈ ΠΈ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²ΡΠ΅Π΅ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΡΡ
ΠΏΡΠΈΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ, Π² ΡΠ°ΡΡΠ½ΠΎΡΡΠΈ, β Π΄Π»Ρ Π°Π½Π°Π»ΠΈΠ·Π° Π΄ΠΈΠ½Π°ΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΡΡΠ°Π΄ΠΈΠΈ ΡΠ°Π·Π²ΠΈΡΠΈΡ Π³Π»ΡΠ±ΠΎΠΊΠΎΠΉ ΠΊΠΎΠ½Π²Π΅ΠΊΡΠΈΠΈ Π² ΠΎΠΊΠ΅Π°Π½Π΅
First Principles Investigation of Magnetic Properties of Fe-Ni-Mn-Al Heusler Alloys
AbstractThe composition dependences of crystal lattice parameters, magnetic moments and magnetic exchange parameters in FexNi2βxMn1+y Al1βy (0.0 β€ x β€ 2.0; 0.0 β€ y β€ 0.6) Heusler alloys are investigated with the help of first principles calculations. Our simulations have shown that crystal lattice parameter is decreased with Fe content (x) increasing. Our calculations show that increase of Fe content (x) leads increasing of magnetic exchange interactions between Mn atoms at regular positions and Mn atoms at Al positions and change of interaction sign from antiferromagnetic type to ferromagnetic one for Fe content x β₯ 1.4. Competitive behavior between ferromagnetic and antiferromagnetic interactions shows that these alloys have a complex magnetic structure. Calculated data for crystal lattice parameter, magnetic moment and magnetic exchange parameters for pure compounds (x = 0.0 and x = 2.0) are in an agreement with theoretical and experimental data
Effects of magnetic and structural phase transitions on the normal and anomalous Hall effects in Ni-Mn-In-B Heusler alloys
Magnetization, electrical resistivity, magnetoresistance, and Hall resistivity of Ni50Mn35In14.25B0.75 and Ni50Mn35In14.5B0.5 Heusler alloys were studied in a temperature range T=80-400K in magnetic fields up to 20 kOe. Both alloys exhibit a martensitic transformation from a higherature ferromagnetic austenite phase to a lowerature, low-magnetization martensitic phase. The electrical resistivity nearly doubles as a result of the martensitic transformation, reaching 180 and 100 ΞΌ cm in the martensitic states of Ni50Mn35In14.25B0.75 and Ni50Mn35In14.5B0.5, respectively. The temperature dependence of the electrical resistivity does not corresponded with the Mooij correlation. The magnetoresistance is negative with a narrow negative peak at the martensitic transition. Normal and anomalous Hall effect coefficients were determined by fitting the field dependences of the Hall resistivity using magnetization data. The coefficients of the normal Hall effect for both compositions were found to decrease with temperature from positive values in the austenite to negative values in the martensite phase. None of the known correlations between the anomalous Hall effect coefficient and resistivity were satisfied. Significant changes in the values of the anomalous Hall coefficients during the martensitic transformation are explained by the difference in spin-up and spin-down state occupations in the martensite and austenite phases. First-principles calculations of the electronic structures confirm this explanation
Notes about the linear complexity of Ding-Helleseth generalized cyclotomic sequences of length pq over the finite field of order p or q
We investigate three classes of Ding-Helleseth-generalized cyclotomic sequences of length pq. We derive the linear complexity and the minimal polynomial of above-mentioned sequences over the finite fields of orders p and q, where p and q are two odd distinct primes, and obtain series of sequences with high linear complexity
Notes about the linear complexity of Ding-Helleseth generalized cyclotomic sequences of length
We investigate three classes of Ding-Helleseth-generalized cyclotomic sequences of length pq. We derive the linear complexity and the minimal polynomial of above-mentioned sequences over the finite fields of orders p and q, where p and q are two odd distinct primes, and obtain series of sequences with high linear complexity
The linear complexity of new q-ary generalized cyclotomic sequences of period p
In this paper, we study the linear complexity of new q-ary generalized cyclotomic sequences of length pn over the finite field of order q. We show that these sequences have the high linear complexity when n β₯ 2. These sequences are constructed by new generalized cyclotomic classed prepared by X. Zeng at el
First-principles and Monte Carlo studies of C-doped Ni45Co5Mn37In13 Heusler alloys
In this work, we report the study of the effect of carbon on electronic and magnetic properties of the Ni45Co5Mn37In13 alloy. Two compounds with addition of 5 at.% C for Mn and In with ferro- and ferrimagnetic spin configurations have been discussed in the framework of first-principles and Monte Carlo calculations. In order to calculate the magnetic exchange parameters, magnetic moments, and electronic density of states curves we have used the SPR-KKR package. We have shown that the addition of carbon leads to enhancement of antiferromagnetic exchange interactions between Mn atoms in martensite of both compounds. The temperature dependences of magnetizations as well as Curie temperatures of austenite and martensite have been obtained