Origin and tuning of room temperature ferromagnetism and ferroelectricity in double perovskite Y2NiMnO6 nanostructured thin films

Alam, Mahebub; Mandal, Kalyan; Khan, Gobinda Gopal

doi:10.1016/j.jallcom.2019.153540

Cited by 11 publications

(3 citation statements)

References 40 publications

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“…where λ s is the coefficient of magnetostriction and σ i is the internal strain. Taking λ s = 10 −4 [43,56] and ⟨σ i ⟩ = 150 MPa-600 MPa [57], we arrive at b 2 IS = 0.0015-0.0240 T 2 . The coefficient b 3 /B 3 of Equation (26), which is also determined by magnetocrystalline anisotropy, may be written for the cubic anisotropy of randomly oriented polycrystalline samples as [58,59]:…”

Section: Resultsmentioning

confidence: 96%

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: 96%

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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“…The survey spectra for the various samples are shown in Figure S8 and indicate the presence of all of the expected elements, with no noticeable impurities. The spectra within the Y 3d region (Figure A) for all samples incorporate peaks located at ∼157 and 159 eV, which can be assigned to the 3d 5/2 and 3d 3/2 peaks for yttrium oxide, respectively. − Moreover, YCMO/Pt and YNMO/Pt both possessed additional signals located at ∼158.2 and 160.2 eV, which could be attributed to the 3d 5/2 and 3d 3/2 peaks for Y 2 (CO 3 ) 3 . Furthermore, YCMO/Pt maintains peaks situated at 155.6 and 157.6 eV, which can be ascribed to the 3d 5/2 and 3d 3/2 peaks for Y 0 …”

Section: Characterization Of Electrocatalystsmentioning

confidence: 95%

Yttrium-based Double Perovskite Nanorods for Electrocatalysis

McGuire

Wesley

Sasaki

et al. 2022

ACS Appl. Mater. Interfaces

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Herein, we investigate the effect of the chemical composition of double perovskite nanorods on their versatile electrocatalytic activity not only as supports for the oxidation of small organic molecules but also as catalysts for the oxygen evolution reaction. Specifically, Y2CoMnO6 and Y2NiMnO6 nanorods with average diameters of 300 nm were prepared by a two-step hydrothermal method, in which the individual effects of synthetic parameters, such as the pH, annealing temperature, and precursor ratios on both the composition and morphology, were systematically investigated. When used as supports for Pt nanoparticles, Y2CoMnO6/Pt catalysts exhibited an electrocatalytic activity for the methanol oxidation reaction, which is 2.1 and 1.3 times higher than that measured for commercial Pt/C and Y2NiMnO6/Pt, respectively. Similarly, the Co-based catalyst support material displayed an ethanol oxidation activity, which is 2.3 times higher than both Pt/C and Y2NiMnO6/Pt. This clear enhancement in the activity for Y2CoMnO6 can largely be attributed to strong metal–support interactions, as evidenced by a downshift in the binding energy of the Pt 4f bands, measured by X-ray photoelectron spectroscopy (XPS), which is often correlated not only with a downshift in the d-band center but also to a decreased adsorption of poisoning adsorbates. Moreover, when used as catalysts for the oxygen evolution reaction, Y2CoMnO6 displayed a much greater activity as compared with Y2NiMnO6. This behavior can largely be attributed not only to a preponderance of comparatively more favorable oxidation states and electronic configurations but also to the formation of an active layer on the surface of the Y2CoMnO6 catalyst, which collectively gives rise to improved performance metrics and greater stability as compared with both IrO2 and Y2NiMnO6. Overall, these results highlight the importance of both the chemical composition and the electronic structure of double perovskites, especially when utilized in multifunctional roles as either supports or catalysts.

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“…where s is the coefficient of magnetostriction and i the internal strain. Taking s = 10 -4 [30] (chapter 8), [43] and i = 150 MPa-600 MPa [44], we arrive at b2 IS = 0.0015-0.0240 T 2 . The coefficient b3/B 3 of Equation ( 15) which is determined also by magnetocrystalline anisotropy may be written for cubic anisotropy of randomly oriented polycrystalline samples as [45,46]:…”

Section: K1 J M -3mentioning

confidence: 98%

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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Origin and tuning of room temperature ferromagnetism and ferroelectricity in double perovskite Y2NiMnO6 nanostructured thin films

Cited by 11 publications

References 40 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

Yttrium-based Double Perovskite Nanorods for Electrocatalysis

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

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