Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure
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. T...
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MDPI AG
2024-01-01
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| Online Access: | https://www.mdpi.com/2673-3978/5/1/1 |
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| author | Gunnar Suchaneck Evgenii Artiukh Nikolay Kalanda Marta Yarmolich Gerald Gerlach |
| author_facet | Gunnar Suchaneck Evgenii Artiukh Nikolay Kalanda Marta Yarmolich Gerald Gerlach |
| author_sort | Gunnar Suchaneck |
| collection | DOAJ |
| description | 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<sup>−1</sup> and 1.5% T<sup>−1</sup> 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<sup>−1</sup>, 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. |
| first_indexed | 2024-04-24T18:22:15Z |
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| issn | 2673-3978 |
| language | English |
| last_indexed | 2024-04-24T18:22:15Z |
| publishDate | 2024-01-01 |
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| record_format | Article |
| series | Electronic Materials |
| spelling | doaj.art-4b11324219d84c7e9d4e9208e12f65cd2024-03-27T13:34:42ZengMDPI AGElectronic Materials2673-39782024-01-015111610.3390/electronicmat5010001Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell StructureGunnar Suchaneck0Evgenii Artiukh1Nikolay Kalanda2Marta Yarmolich3Gerald Gerlach4Solid-State Electronics Laboratory, TU Dresden, 01062 Dresden, GermanyCryogenic Research Division, SSPA “Scientific-Practical Materials Research Centre of NAS of Belarus”, 220072 Minsk, BelarusCryogenic Research Division, SSPA “Scientific-Practical Materials Research Centre of NAS of Belarus”, 220072 Minsk, BelarusCryogenic Research Division, SSPA “Scientific-Practical Materials Research Centre of NAS of Belarus”, 220072 Minsk, BelarusSolid-State Electronics Laboratory, TU Dresden, 01062 Dresden, GermanyIn 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<sup>−1</sup> and 1.5% T<sup>−1</sup> 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<sup>−1</sup>, 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.https://www.mdpi.com/2673-3978/5/1/1strontium ferromolybdatenanogranular structurecore-shell ceramicstunnel magnetoresistancemagnetic flux sensitivitytemperature coefficient |
| spellingShingle | Gunnar Suchaneck Evgenii Artiukh Nikolay Kalanda Marta Yarmolich Gerald Gerlach Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure Electronic Materials strontium ferromolybdate nanogranular structure core-shell ceramics tunnel magnetoresistance magnetic flux sensitivity temperature coefficient |
| title | Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure |
| title_full | Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure |
| title_fullStr | Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure |
| title_full_unstemmed | Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure |
| title_short | Nanogranular Strontium Ferromolybdate/Strontium Molybdate Ceramics—A Magnetic Material Possessing a Natural Core-Shell Structure |
| title_sort | nanogranular strontium ferromolybdate strontium molybdate ceramics a magnetic material possessing a natural core shell structure |
| topic | strontium ferromolybdate nanogranular structure core-shell ceramics tunnel magnetoresistance magnetic flux sensitivity temperature coefficient |
| url | https://www.mdpi.com/2673-3978/5/1/1 |
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