Superparamagnetism and ferrimagnetism in the Sr2FeMoO6–δ nanoscale powder

Каланда, Н. А.; Yarmolich, Marta; Burko, Aliaksandr; Темиров, А. А.; Kislyuk, A. M.; Demyanov, S. E.; Lenz, K.; Lindner, J.; Kim, Dong-Hyun

doi:10.1016/j.ceramint.2022.05.066

Cited by 2 publications

(3 citation statements)

References 33 publications

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“…Thus, the b 1 /B term is effective only in a limited field range. If one only considers the term b 1 /B for nanogranular SFMO/SMO core-shell ceramics made by means of the citrate gel method [50], the m(B) characteristic is well approximated by b 1 = 0.05 T below 0.1 T, b 1 = 0.085 T in the region 0.3-1 T, and b 1 = 0.02 T in the region 1.5-4 T. On the other hand, the m(B) curve of a similar sample measured in a different setup [51] in this approach yields b 1 ≈ 0.3 T for magnetic fluxes in the range 2-10 T. The values given by the authors of [51] are b 1 = 0.968 T and b 2 = 0.00292 T 2 .…”

Section: Resultsmentioning

confidence: 81%

“…Taking our SFMO unit cell volume of V = 2.45 × 10 −28 m 3 , a saturation magnetization of µ = 2.6 µ B f.u. −1 for material synthesized by the same procedure [51,65], and assuming a density of 98% of the theoretical one, a total magnetic moment of a granule amounting to µ = 2000 µ B corresponds to a granule size of about 3 nm, while a value µ = 10 4 µ B corresponds to a granule size of about 5 nm. Since the spin polarization of SFMO is significantly higher than that of Co and Fe, the magnetic field sensitivity of SFMO will be correspondingly larger.…”

Section: Resultsmentioning

confidence: 99%

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Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure

Suchaneck,

Artiukh,

Kalanda

et al. 2024

Electronic Materials

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In this work, we demonstrate the preparation of easy-to-fabricate nanogranular strontium ferromolybdate/strontium molybdate core-shell ceramics and examine their properties, including tunnel magnetoresistance, magnetic field sensitivity, and temperature coefficient of the tunnel magnetoresistance. The tunnel magnetoresistance of nanogranular strontium ferromolybdate/strontium molybdate core-shell ceramics was modeled, yielding values suitable for magnetoresistive sensor applications. Such structures possess a narrow peak of magnetic flux sensibility located at about 80 mT. For magnetic flux measurement, single-domain granules with superparamagnetic behavior should be applied. The predicted TMR magnetic flux sensitivities for granules with superparamagnetic behavior amount to about 7.7% T−1 and 1.5% T−1 for granule sizes of 3 nm and 5 nm, respectively. A drawback of the tunnel magnetoresistance of such nanogranular core-shell ceramics is the unacceptably large value of the temperature coefficient. Acceptable values, lower than 2% K−1, are obtained only at low temperatures (less than 100 K) or large magnetic flux densities (exceeding 6 T). Therefore, a Wheatstone bridge configuration should be adopted for magnetoresistive sensor design to compensate for the effect of temperature.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure

Suchaneck,

Artiukh,

Kalanda

et al. 2024

Electronic Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thus, the b1/B term is effective only in a limited field range. If one only considers the term b1/B, for nanogranular SFMO/SMO core-shell ceramics made by means of the citrate gel method [37], the m(B) characteristics is well approximated by b1 = 0.05 T below 0.1 T, b1 = 0.085 T in the region 0.3-1 T and b1 = 0.02 T in the region 1.5 -4 T. On the other hand, the m(B) curve of a similar sample measured in a different setup [38] in this approach yields b1 ≈ 0.3 T for magnetic fluxes in the range 2-10 T. The values given by the authors of [38] are b1 = 0.968 T and b2 = 0.00292 T 2 .…”

Section: Methodsmentioning

confidence: 85%

Strontium Ferromolybdate/Strontium Molybdate Core-Shell Ceramics—A Nanogranular Magnetic Material Possessing a Natural Core-Shell Structure

Suchaneck,

Artiukh,

Kalanda

et al. 2023

Preprint

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In this work, we demonstrate the preparation of easy-to-fabricate nanogranular, strontium ferromolybdate/strontium molybdate core-shell ceramics and examine their properties including tunnel magnetoresistance, magnetic field sensitivity and temperature coefficient of the tunnel magnetoresistance. The tunnel magnetoresistance of nanogranular, strontium ferromolybdate/strontium molybdate core-shell ceramics was modeled yielding values suitable for magnetoresistive sensor application. Such structures possess a narrow peak of magnetic flux sensibility located at about 125 mT. For magnetic flux measurement, single domain granules with superparamagnetic behavior should be applied. The predicted TMR magnetic flux sensitivities for granules with superparamagnetic behavior amount to about 7.7 % per T and 1.5 % per T for granules sizes of 6.8 nm and 4 nm, respectively. A drawback of the tunnel magnetoresistance of such nanogranular core-shell ceramics is the unacceptable large value of the temperature coefficient. Acceptable values, lower than 2 % per K, are obtained only at low temperatures (less than 100 K) or large magnetic flux densities (exceeding 6 T). Therefore, a Wheatstone bridge configuration should be adopted for magnetoresistive sensors design to compensate the effect of temperature.

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Superparamagnetism and ferrimagnetism in the Sr2FeMoO6–δ nanoscale powder

Cited by 2 publications

References 33 publications

Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure

Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure

Strontium Ferromolybdate/Strontium Molybdate Core-Shell Ceramics—A Nanogranular Magnetic Material Possessing a Natural Core-Shell Structure

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