Magnetoresonance properties of manganite La1−xSrxMnO3 (x = 0.15; 0.225; 0.3; 0.45; 0.6)

Kalmykova, T. V.; Nedukh, S. V.; Polevoy, Sergey; Kharchenko, A. A.; Tarapov, S. I.; Belozorov, D. P.; Pogorily, A. M.; Polek, T. I.; Pashchenko, V. A.; Bludov, A. N.

doi:10.1063/1.4918758

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…The external static magnetic fi eld 0 H  is directed along the OY axis (Fig. 2) [6,7,11,12]. The waveguide is positioned so that the sample is located between the electromagnet poles to satisfy the FMR-conditions 11].…”

Section: Mmentioning

confidence: 99%

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A magnetoactive metamaterial based on a structured ferrite

Polevoy¹,

Kharchenko²,

Tarapov³

et al. 2021

RADIOFIZ. ELEKTRON.

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Subject and Purpose. The use of spatially structured ferromagnets is promising for designing materials with unique predetermined electromagnetic properties welcome to the development of magnetically controlled microwave and optical devices. The paper addresses the electromagnetic properties of structured ferrite samples of a different shape (spatial geometry) and is devoted to their research by the method of electron spin resonance (ESR). Methods and methodology. The research into magnetic properties of structured ferrite samples was performed by the ESR method. The measurements of transmission coefficient spectra were carried out inside a rectangular waveguide with an external magnetic field applied. Results. We have experimentally shown that over a range of external magnetic field strengths, the frequency of the ferromagnetic resonance (FMR) of grooved ferrite samples (groove type spatial geometry) increases with the groove depth. The FMR frequency depends also on the groove orientation relative to the long side of the sample. We have shown that as the external static magnetic field approaches the saturation field of the ferrite, the FMR frequency dependence on the external static magnetic field demonstrates "jump-like" behavior. And as the magnetic field exceeds the ferrite saturation field, the FMR frequency dependence on the groove depth gets a monotonic character and rises with the further growth of the field strength. Conclusion. We have shown that the use of structured ferrites as microwave electronics components becomes reasonable at magnetic field strengths exceeding the saturation field of the ferrite. At these fields, such a ferrite offers a monotonically increasing dependence of the resonant frequency on the external magnetic field and on the depth of grooves on the ferrite surface. Structured ferrites are promising in the microwave range as components of controlled filters, polarizers, anisotropic ferrite resonators since they can provide predetermined effective permeability and anisotropy

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Section: Mmentioning

confidence: 99%

“…The main advantage of the abovementioned fi lters is wideband-frequency tunability. The fi lters based on magnetically con-trolled photonic crystals with their magnetoactive elements constructed of ferromagnetic materials are eff ective in the microwave and optical ranges [1][2][3][4][5][6][7][8].…”

mentioning

confidence: 99%

A magnetoactive metamaterial based on a structured ferrite

Polevoy¹,

Kharchenko²,

Tarapov³

et al. 2021

RADIOFIZ. ELEKTRON.

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“…Викликано це тим, що саме для спо-луки La 1x Sr x MnO 3 спостерігалися рекордні значення температури Кюрі (Т С  370 К) для цього класу матеріялів [9]. Тому даний вид заміщення так детально вивчається багатьма дослідниками [10][11][12][13][14], а деякі роботи можна назвати «класичними» для даного на-пряму. Проте, практично у всіх ранніх роботах об'єкти досліджень були виготовлені традиційною на той час методою твердофазної си-нтези.…”

Section: вступunclassified

Structural, Electrical and Magnetoresistive Properties of Strontium-Substituted Lanthanum Manganites

Polek¹,

Tovstolytkin²,

Solopan³

et al. 2016

Metallofiz. Noveishie Tekhnol.

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Досліджено структурні, електричні та магнеторезистивні властивості зразків La 1x Sr x MnO 3 (х  0,15-0,60), виготовлених золь-ґель-методою. Кристалографічні параметри визначалися за допомогою рентґенівської дифракції. Вимірювання електричних властивостей виконувалися в тем-пературному інтервалі 77-380 К як у магнетному полі, так і без нього. Проаналізовано температурні залежності електричних та магнеторезис-тивних властивостей сполуки при різних концентраціях Sr. Встановлено концентраційну залежність температури Кюрі Т С для сполуки La 1x Sr x MnO 3 .

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