Magnetic anisotropy of strained epitaxial manganite films

Демидов, В. В.; Borisenko, I. V.; Klimov, A. A.; Ovsyannikov, G. A.; Petrzhik, A. M.; Никитов, С. А.

doi:10.1134/s1063776111040029

Cited by 24 publications

(25 citation statements)

References 17 publications

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“…The LSMO films with the thickness of 50 -100 nm were epitaxially grown on the (011) surface of the 550.5 mm NdGaO 3 (NGO) substrate by laser ablation; for detailed description see Refs. [27,28]. To obtain the FM/NM bilayers, Au was deposited over the LSMO film in situ, whereas Pt was deposited over LSMO ex situ.…”

Section: Methodsmentioning

confidence: 99%

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Resonance spin–charge phenomena and mechanism of magnetoresistance anisotropy in manganite/metal bilayer structures

Ацаркин¹,

Sorokin²,

Borisenko³

et al. 2016

J. Phys. D: Appl. Phys.

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The dc voltage generated under ferromagnetic resonance has been studied in bilayer structures based on manganite thin epitaxial films La 0.67 Sr 0.33 MnO 3 (LSMO) and non-magnetic metals (Au, Pt, and SrRuO 3 ) in the temperature range up to the Curie point. The effect is shown to be caused by two different phenomena: (1) the resonance dc electromotive force related to anisotropic magnetoresistance (AMR) in the manganite film and (2) pure spin current (spin pumping) registered by means of the inverse spin Hall effect in normal metal. The two phenomena were separated using the angular dependence of the effect, the external magnetic field H 0 being rotated in the film plane. It was found that the AMR mechanism in the manganite films differs substantially from that in traditional ferromagnetic metals being governed by the colossal magnetoresistance together with the in-plane magnetic anisotropy. The spin pumping effect registered in the bilayers was found to be much lower than that reported for common ferromagnets; possible reasons are discussed.

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Section: Methodsmentioning

confidence: 99%

“…The LSMO/SRO bilayer films were epitaxially grown on the same substrate by RF magnetron sputtering [29]. It is known [27,30] (Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

Resonance spin–charge phenomena and mechanism of magnetoresistance anisotropy in manganite/metal bilayer structures

Ацаркин¹,

Sorokin²,

Borisenko³

et al. 2016

J. Phys. D: Appl. Phys.

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“…We measured the spectra of ferromagnetic The angular dependence of the FMR spectrum of a thin ferromagnetic film in the presence of uniaxial and biaxial anisotropy for a case H 0 is lying in the plane of the film is described by the formula [30]:…”

Section: Introductionmentioning

confidence: 99%

Magnetic proximity effect at the interface between a cuprate superconductor and an oxide spin valve

Ovsyannikov

Демидов

Khaydukov

et al. 2016

J. Exp. Theor. Phys.

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“…We used substrates with the dimensions 5 Â 5 mm made of (110)NdGaO 3 (NGO), (001) LaAlO 3 (LAO), and (LaAlO 3 ) 0.3 þ (Sr 2 AlTaO 6 ) 0.7 (LSAT). The magnetization vector of the LSMO epitaxial film deposited on a (110)NGO substrate or onto a (001)YBCO film, is generally in the plane of the substrate, 43,44 whereas for the SRO film the magnetization vector is outside of the plane of the substrates used. 45 A detailed study of the field and temperature dependences of magnetization of the separate films and heterostructures was conducted using a SQUID-magnetometer MPMS-3 produced by Quantum Design in the VSM mode.…”

Section: Experimental Procedures and Samplesmentioning

confidence: 99%

“…The direction of this axis was pre-determined from the angular dependences of the resonance field H CF , taken at different temperatures under the conditions of magnetic field rotations around the normal to the substrate plane in a parallel orientation. 44 The angular dependences of the FMR spectrum of thin ferromagnetic film in the presence of uniaxial and biaxial anisotropy are described by the following equation: 44…”

Section: Ferromagnetic Resonance In the Heterostructurementioning

confidence: 99%

Magnetic proximity effect and superconducting triplet correlations at the cuprate superconductor and oxide spin valve interface

Ovsyannikov

Constantinian

Демидов

et al. 2016

Low Temperature Physics

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A heterostructure consisting of a cuprate superconductor YBa 2 Cu 3 O 7-d and a ruthenate/manganite (SrRuO 3 /La 0.7 Sr 0.3 MnO 3 ) spin valve was studied using SQUID magnetometry, ferromagnetic resonance, and neutron reflectometry. It is shown that because of the magnetic proximity effect a magnetic moment is excited in the superconducting portion of the heterostructure, whereas the magnetic moment in the spin valve becomes suppressed. The experimentally obtained value of a typical penetration depth of a magnetic moment into the superconductor is significantly greater than the coherence length of the cuprate superconductor, which indicates that the induced magnetic moment mechanism of Cu atoms is dominant. The mesastructure prepared by adding niobium film as a second superconducting electrode to the existing heterostructure, exhibited a superconducting current (dc Josephson effect) at interlayer thicknesses that are much greater than the coherence length of the ferromagnetic materials. The maximum of the critical current density dependence on the thickness of the spin valve material corresponds to the interlayer coherence length, which agrees with the theoretical predictions associated with spin-triplet pairing. The superconducting current is observed at magnetic fields that are two orders of magnitude greater than the field corresponding to the occurrence of one magnetic flux quantum in the mesastructure. The ratio of the second harmonic of the current-phase dependence of the mesastructure superconducting current to the first, determined according to the dependence of the Shapiro steps on the amplitude of microwave exposure, did not exceed 50%. Published by AIP Publishing. [http://dx

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Magnetic anisotropy of strained epitaxial manganite films

Cited by 24 publications

References 17 publications

Resonance spin–charge phenomena and mechanism of magnetoresistance anisotropy in manganite/metal bilayer structures

Resonance spin–charge phenomena and mechanism of magnetoresistance anisotropy in manganite/metal bilayer structures

Magnetic proximity effect at the interface between a cuprate superconductor and an oxide spin valve

Magnetic proximity effect and superconducting triplet correlations at the cuprate superconductor and oxide spin valve interface

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