54 research outputs found
Synthesis and Magnetic Properties of [(CoP)soft/NiP/(CoP)hard/NiP]n Films
Π’Π΅ΠΊΡΡ ΡΡΠ°ΡΡΠΈ Π½Π΅ ΠΏΡΠ±Π»ΠΈΠΊΡΠ΅ΡΡΡ Π² ΠΎΡΠΊΡΡΡΠΎΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΆΡΡΠ½Π°Π»Π°.Magnetic interactions in the Co-Ni-P multilayers consisting of alternating magnetically soft and magnetically hard layers are experimentally investigated. The variation in the shape of magnetization loop at the conjugation of magnetically soft and magnetically hard layers and the saturation field oscillations with varying number of layer pairs are established. It is demonstrated that insertion of a nonmagnetic spacer significantly affects magnetization reversal in the structure. It is concluded that in studying the interlayer coupling it is necessary to take into account the biquadratic interaction.
Π ΡΠ°Π±ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΏΠ»Π΅Π½ΠΎΠΊ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Co-Ni-P, ΠΊΠΎΠ³Π΄Π° ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΡΠ»ΠΎΠ΅Π² ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΈΠΌ, Π° Π΄ΡΡΠ³ΠΎΠΉ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΆΠ΅ΡΡΠΊΠΈΠΌ. ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠΎΡΠΌΡ ΠΏΠ΅ΡΠ»ΠΈ Π½Π°ΠΌΠ°Π³Π½ΠΈΡΠΈΠ²Π°Π½ΠΈΡ ΠΏΡΠΈ ΡΠΎΠΏΡΡΠΆΠ΅Π½ΠΈΠΈ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΎΠ³ΠΎ ΠΈ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΆΠ΅ΡΡΠΊΠΎΠ³ΠΎ ΡΠ»ΠΎΠ΅Π², ΠΈ ΠΎΡΡΠΈΠ»Π»ΡΡΠΈΡ ΠΏΠΎΠ»Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΡΠΈΡΠ»Π° ΠΏΠ°Ρ ΡΠ»ΠΎΠ΅Π². ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ Π½Π΅ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΎΡΠ»ΠΎΠΉΠΊΠΈ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΠΈΠ·ΠΌΠ΅Π½ΡΠ΅Ρ ΠΏΡΠΎΡΠ΅ΡΡ ΠΏΠ΅ΡΠ΅ΠΌΠ°Π³Π½ΠΈΡΠΈΠ²Π°Π½ΠΈΡ ΡΡΡΡΠΊΡΡΡΡ. ΠΠ΅Π»Π°Π΅ΡΡΡ Π²ΡΠ²ΠΎΠ΄ ΠΎ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΡΡΠ΅ΡΠ° Π±ΠΈΠΊΠ²Π°Π΄ΡΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΏΡΠΈ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΈΠΈ ΠΌΠ΅ΠΆΡΠ»ΠΎΠ΅Π²ΡΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ
Synthesis and Magnetic Properties of [(CoP)soft/NiP/(CoP)hard/NiP]n Films
Π’Π΅ΠΊΡΡ ΡΡΠ°ΡΡΠΈ Π½Π΅ ΠΏΡΠ±Π»ΠΈΠΊΡΠ΅ΡΡΡ Π² ΠΎΡΠΊΡΡΡΠΎΠΌ Π΄ΠΎΡΡΡΠΏΠ΅ Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ ΠΏΠΎΠ»ΠΈΡΠΈΠΊΠΎΠΉ ΠΆΡΡΠ½Π°Π»Π°.Magnetic interactions in the Co-Ni-P multilayers consisting of alternating magnetically soft and magnetically hard layers are experimentally investigated. The variation in the shape of magnetization loop at the conjugation of magnetically soft and magnetically hard layers and the saturation field oscillations with varying number of layer pairs are established. It is demonstrated that insertion of a nonmagnetic spacer significantly affects magnetization reversal in the structure. It is concluded that in studying the interlayer coupling it is necessary to take into account the biquadratic interaction.
Π ΡΠ°Π±ΠΎΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ ΠΌΠ°Π³Π½ΠΈΡΠ½ΡΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ ΠΌΠ½ΠΎΠ³ΠΎΡΠ»ΠΎΠΉΠ½ΡΡ
ΠΏΠ»Π΅Π½ΠΎΠΊ Π² ΡΠΈΡΡΠ΅ΠΌΠ΅ Co-Ni-P, ΠΊΠΎΠ³Π΄Π° ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΡΠ»ΠΎΠ΅Π² ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΈΠΌ, Π° Π΄ΡΡΠ³ΠΎΠΉ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΆΠ΅ΡΡΠΊΠΈΠΌ. ΠΠ±Π½Π°ΡΡΠΆΠ΅Π½Ρ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠΎΡΠΌΡ ΠΏΠ΅ΡΠ»ΠΈ Π½Π°ΠΌΠ°Π³Π½ΠΈΡΠΈΠ²Π°Π½ΠΈΡ ΠΏΡΠΈ ΡΠΎΠΏΡΡΠΆΠ΅Π½ΠΈΠΈ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΌΡΠ³ΠΊΠΎΠ³ΠΎ ΠΈ ΠΌΠ°Π³Π½ΠΈΡΠΎΠΆΠ΅ΡΡΠΊΠΎΠ³ΠΎ ΡΠ»ΠΎΠ΅Π², ΠΈ ΠΎΡΡΠΈΠ»Π»ΡΡΠΈΡ ΠΏΠΎΠ»Ρ Π½Π°ΡΡΡΠ΅Π½ΠΈΡ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΡΠΈΡΠ»Π° ΠΏΠ°Ρ ΡΠ»ΠΎΠ΅Π². ΠΠ²Π΅Π΄Π΅Π½ΠΈΠ΅ Π½Π΅ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎΠΉ ΠΏΡΠΎΡΠ»ΠΎΠΉΠΊΠΈ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ ΠΈΠ·ΠΌΠ΅Π½ΡΠ΅Ρ ΠΏΡΠΎΡΠ΅ΡΡ ΠΏΠ΅ΡΠ΅ΠΌΠ°Π³Π½ΠΈΡΠΈΠ²Π°Π½ΠΈΡ ΡΡΡΡΠΊΡΡΡΡ. ΠΠ΅Π»Π°Π΅ΡΡΡ Π²ΡΠ²ΠΎΠ΄ ΠΎ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΡΡΠ΅ΡΠ° Π±ΠΈΠΊΠ²Π°Π΄ΡΠ°ΡΠΈΡΠ½ΠΎΠ³ΠΎ Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΡ ΠΏΡΠΈ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½ΠΈΠΈ ΠΌΠ΅ΠΆΡΠ»ΠΎΠ΅Π²ΡΡ
Π²Π·Π°ΠΈΠΌΠΎΠ΄Π΅ΠΉΡΡΠ²ΠΈΠΉ
Magnetic properties of Fe-Bi films
In the paper the results of experimental studies of film structures in the Fe-Bi system are presented. By the method of electron magnetic resonance, it is shown that for bilayer structures the magnetic state depends on the order of deposition of the magnetic and non-magnetic layers. In the three-layer structures, the effect of exchange bias was found, the magnitude of that depends on the thickness of the bismuth layer. Β© Published under licence by IOP Publishing Ltd
Probing the Phase Separation in the Doped Manganites by the Magnetic Resonance Methods
Here we present magnetic resonance study which confirms an existence of a phase separation picture in EuPbMnO single crystals. The measurements were performed with a standard technique and with using unconventional schemes of the magnetic resonance method. The inhomogeneous paramagnetic-ferromagnetic state, which is sensitive to a magnetic field, takes place in 0.65T-1.15T temperature range, where the colossal magnetoresistance effect is observed. The behavior of spectra suggests that a scenario of the phase separation is realized and the mixed state is not related to a simple chemical inhomogeneity. The changes of the conductivity induced by the microwave resonance absorption are observed in a vicinity of T, too. The changes are not related to a trivial heating of the sample by a microwave radiation. We propose a mechanism connected with the change of equilibrium concentrations of the coexisting phases, this change takes place when the system is under magnetic resonance conditions. To analyze the experimental data we applied the effective-medium approximation for two-component system. Also we attracted the simplest phenomenological model qualitatively reproducing the essential features of the behavior of the two-phase system
Magnetic resonance in FeNi/Bi/FeNi 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 magnetic resonance in FeNi/Bi/FeNi trilayer films with nonmagnetic semimetal spacer has been experimentally studied. It is found that the microwave absorption spectrum of samples has a complicated shape dependent on the nonmagnetic spacer thickness. In the interval of Bi layer thicknesses within 3β15 nm, the interlayer coupling has an antiferromagnetic character. Β© 2015, Pleiades Publishing, Ltd
Magnetic resonance in FeNi/Bi/FeNi 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 magnetic resonance in FeNi/Bi/FeNi trilayer films with nonmagnetic semimetal spacer has been experimentally studied. It is found that the microwave absorption spectrum of samples has a complicated shape dependent on the nonmagnetic spacer thickness. In the interval of Bi layer thicknesses within 3β15 nm, the interlayer coupling has an antiferromagnetic character. Β© 2015, Pleiades Publishing, Ltd
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