15 research outputs found
Π‘ΠΈΠ½ΡΠ΅Π·, ΠΌΠΈΠΊΡΠΎΡΡΡΡΠΊΡΡΡΠ° ΠΈ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΠ΅ ΡΠ²ΠΎΠΉΡΡΠ²Π° ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΈΡ ΠΏΠ»Π΅Π½ΠΎΠΊ Π‘ΠΎΠ
Soft magnetic thin CoP films were obtained by means of chemical metallization from aqueous cobalt salt solution in the presence of sodium hydroxide, citric acid and sodium hypophosphite as the reducing agent. The optimal values of the magnetic film parameters (saturation magnetization and width of ferromagnetic resonance line) were obtained by variation of composition of work solutions. It allows to reduce losses in their application in microwave devices. Microphotographs of magnetic film indicate a grain structure with a grain size of about 50 nm and presence of inclusions with the size of 3-5 nm. To determine the magnetic parameters of the investigated films the method of ferromagnetic resonance (FMR) absorption curves processing is used. The values of FMR line width and an effective magnetization of film material saturation were obtained.ΠΡΠΈΠ²Π΅Π΄Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²ΠΎΠΉΡΡΠ² ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΈΡ
ΡΠΎΠ½ΠΊΠΈΡ
ΠΏΠ»Π΅Π½ΠΎΠΊ Π‘ΠΎΠ , ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΡΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠΌ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠ΅ΡΠ°Π»Π»ΠΈΠ·Π°ΡΠΈΠΈ ΠΈΠ· Π²ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠ°ΡΡΠ²ΠΎΡΠ° Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΡΠΈΡΡΠ°ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π² ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΡΠ΅Π»ΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ΅Π°Π³Π΅Π½ΡΠ° NaOH. Π‘ ΠΏΠΎΠΌΠΎΡΡΡ Π²Π°ΡΠΈΠ°ΡΠΈΠΈ ΡΠΎΡΡΠ°Π²ΠΎΠ² ΡΠ°Π±ΠΎΡΠΈΡ
ΡΠ°ΡΡΠ²ΠΎΡΠΎΠ² ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΡΠ΅ Π·Π½Π°ΡΠ΅Π½ΠΈΡ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΏΠ»Π΅Π½ΠΎΠΊ: Π½Π°ΠΌΠ°Π³Π½ΠΈΡΠ΅Π½Π½ΠΎΡΡΠΈ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ ΠΈ ΡΠΈΡΠΈΠ½Ρ Π»ΠΈΠ½ΠΈΠΈ ΡΠ΅ΡΡΠΎΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠ΅Π·ΠΎΠ½Π°Π½ΡΠ°
Effect of alkali reagents on the crystal structure of chemically deposited CoP films
Π’Π΅ΠΊΡΡ ΡΡΠ°ΡΡΠΈ Π½Π΅ ΠΏΡΠ±Π»ΠΈΠΊΡΠ΅ΡΡΡ Π² ΠΎΡΠΊΡΡΡΠΎΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΆΡΡΠ½Π°Π»Π°.AbstractβThe effect alkali reagents have on the crystal structure of CoP films prepared via chemical depo
sition is investigated. It is shown that the use of sodium hydrogen carbonate and ammonium hydroxide in low
concentrations leads to growth of the hexagonal phase in the films. As the concentration of alkali reagents is
increased, the formation of a cubic or amorphous phase is observed
Influence of solution acidity on growth kinetics, structure and magnetic properties of Co-P films, obtained by chemical deposition
The results of studies of the effect of solution acidity on the growth kinetics,
structure and magnetic properties of Co-P films obtained by chemical deposition are presented.
It was shown that the growth of Co-P films in the low pH region occurs mainly due to the
growth of crystallite sizes, and in the high pH region, due to an increase in the nucleation rate.
From the analysis of the chemical equilibrium of redox reactions, taking into account the
balance of citrate and hydroxyl complexes of Co, a qualitative explanation of the features of
the change in the rate and nature of the deposition of Co atoms from pH is proposed
On Nature of the Induced Anisotropy in the Chemically Deposited Π‘ΠΎβΠ Films
The induced magnetic anisotropy in the Π‘ΠΎβΠ films prepared by chemical deposition from liquid solutions in a magnetic field has been investigated. The pronounced difference between the anisotropy values and relaxation times points out the existence of different physical mechanisms responsible for the occurrence of anisotropy of the Π‘ΠΎβΠ films at low and high pH values. Possible mechanisms of the induced anisotropy in the Π‘ΠΎβΠ films prepared at different pH values are discussed
Synthesis, Microstructure and Magnetic Properties of Soft Magnetic CoP Films
Soft magnetic thin CoP films were obtained by means of chemical metallization from aqueous cobalt salt solution in the presence of sodium hydroxide, citric acid and sodium hypophosphite as the reducing agent. The optimal values of the magnetic film parameters (saturation magnetization and width of ferromagnetic resonance line) were obtained by variation of composition of work solutions. It allows to reduce losses in their application in microwave devices. Microphotographs of magnetic film indicate a grain structure with a grain size of about 50 nm and presence of inclusions with the size of 3-5 nm. To determine the magnetic parameters of the investigated films the method of ferromagnetic resonance (FMR) absorption curves processing is used. The values of FMR line width and an effective magnetization of film material saturation were obtained
On Nature of the Induced Anisotropy in the Chemically Deposited Π‘ΠΎβΠ Films
Π’Π΅ΠΊΡΡ ΡΡΠ°ΡΡΠΈ Π½Π΅ ΠΏΡΠ±Π»ΠΈΠΊΡΠ΅ΡΡΡ Π² ΠΎΡΠΊΡΡΡΠΎΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΆΡΡΠ½Π°Π»Π°.The induced magnetic anisotropy in the Π‘ΠΎβΠ films prepared by chemical deposition from
liquid solutions in a magnetic field has been investigated. The pronounced difference between the
anisotropy values and relaxation times points out the existence of different physical mechanisms
responsible for the occurrence of anisotropy of the Π‘ΠΎβΠ films at low and high pH values. Possible
mechanisms of the induced anisotropy in the Π‘ΠΎβΠ films prepared at different pH values are discussed
Effect of alkali reagents on the crystal structure of chemically deposited CoP films
Π’Π΅ΠΊΡΡ ΡΡΠ°ΡΡΠΈ Π½Π΅ ΠΏΡΠ±Π»ΠΈΠΊΡΠ΅ΡΡΡ Π² ΠΎΡΠΊΡΡΡΠΎΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΆΡΡΠ½Π°Π»Π°.AbstractβThe effect alkali reagents have on the crystal structure of CoP films prepared via chemical depo
sition is investigated. It is shown that the use of sodium hydrogen carbonate and ammonium hydroxide in low
concentrations leads to growth of the hexagonal phase in the films. As the concentration of alkali reagents is
increased, the formation of a cubic or amorphous phase is observed