Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy
Superlattices (SLs) comprising layers of a soft ferromagnetic metal La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> (LSMO) with in-plane (IP) magnetic easy axis and a hard ferromagnetic insulator La<sub>2</sub>MnCoO<sub>6</sub> (LMCO, out-o...
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MDPI AG
2023-11-01
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| author | Vitaly Bruchmann-Bamberg Isabell Weimer Vladimir Roddatis Ulrich Ross Leonard Schüler Karen P. Stroh Vasily Moshnyaga |
| author_facet | Vitaly Bruchmann-Bamberg Isabell Weimer Vladimir Roddatis Ulrich Ross Leonard Schüler Karen P. Stroh Vasily Moshnyaga |
| author_sort | Vitaly Bruchmann-Bamberg |
| collection | DOAJ |
| description | Superlattices (SLs) comprising layers of a soft ferromagnetic metal La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> (LSMO) with in-plane (IP) magnetic easy axis and a hard ferromagnetic insulator La<sub>2</sub>MnCoO<sub>6</sub> (LMCO, out-of-plane anisotropy) were grown on SrTiO<sub>3</sub> (100)(STO) substrates by a metalorganic aerosol deposition technique. Exchange spring magnetic (ESM) behavior between LSMO and LMCO, manifested by a spin reorientation transition of the LSMO layers towards perpendicular magnetic anisotropy below <i>T</i><sub>SR</sub> = 260 K, was observed. Further, 3ω measurements of the [(LMCO)<sub>9</sub>/(LSMO)<sub>9</sub>]<sub>11</sub>/STO(100) superlattices revealed extremely low values of the cross-plane thermal conductivity <i>κ</i>(300 K) = 0.32 Wm<sup>−1</sup>K<sup>−1</sup>. Additionally, the thermal conductivity shows a peculiar dependence on the applied IP magnetic field, either decreasing or increasing in accordance with the magnetic disorder induced by ESM. Furthermore, both positive and negative magnetoresistance were observed in the SL in the respective temperature regions due to the formation of 90°-Néel domain walls within the ESM, when applying IP magnetic fields. The results are discussed in the framework of electronic contribution to thermal conductivity originating from the LSMO layers. |
| first_indexed | 2024-03-11T11:24:21Z |
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| id | doaj.art-70f7896cd1a140e181e252e13013ecf1 |
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| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T11:24:21Z |
| publishDate | 2023-11-01 |
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| series | Nanomaterials |
| spelling | doaj.art-70f7896cd1a140e181e252e13013ecf12023-11-10T15:09:19ZengMDPI AGNanomaterials2079-49912023-11-011321289710.3390/nano13212897Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic AnisotropyVitaly Bruchmann-Bamberg0Isabell Weimer1Vladimir Roddatis2Ulrich Ross3Leonard Schüler4Karen P. Stroh5Vasily Moshnyaga6Erstes Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyErstes Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyHelmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, GermanyIV. Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyErstes Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyErstes Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanyErstes Physikalisches Institut, Georg-August-University Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, GermanySuperlattices (SLs) comprising layers of a soft ferromagnetic metal La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> (LSMO) with in-plane (IP) magnetic easy axis and a hard ferromagnetic insulator La<sub>2</sub>MnCoO<sub>6</sub> (LMCO, out-of-plane anisotropy) were grown on SrTiO<sub>3</sub> (100)(STO) substrates by a metalorganic aerosol deposition technique. Exchange spring magnetic (ESM) behavior between LSMO and LMCO, manifested by a spin reorientation transition of the LSMO layers towards perpendicular magnetic anisotropy below <i>T</i><sub>SR</sub> = 260 K, was observed. Further, 3ω measurements of the [(LMCO)<sub>9</sub>/(LSMO)<sub>9</sub>]<sub>11</sub>/STO(100) superlattices revealed extremely low values of the cross-plane thermal conductivity <i>κ</i>(300 K) = 0.32 Wm<sup>−1</sup>K<sup>−1</sup>. Additionally, the thermal conductivity shows a peculiar dependence on the applied IP magnetic field, either decreasing or increasing in accordance with the magnetic disorder induced by ESM. Furthermore, both positive and negative magnetoresistance were observed in the SL in the respective temperature regions due to the formation of 90°-Néel domain walls within the ESM, when applying IP magnetic fields. The results are discussed in the framework of electronic contribution to thermal conductivity originating from the LSMO layers.https://www.mdpi.com/2079-4991/13/21/2897superlatticeshigh-resolution STEMexchange spring magnetperpendicular magnetic anisotropymagneto-thermal conductivity |
| spellingShingle | Vitaly Bruchmann-Bamberg Isabell Weimer Vladimir Roddatis Ulrich Ross Leonard Schüler Karen P. Stroh Vasily Moshnyaga Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy Nanomaterials superlattices high-resolution STEM exchange spring magnet perpendicular magnetic anisotropy magneto-thermal conductivity |
| title | Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy |
| title_full | Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy |
| title_fullStr | Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy |
| title_full_unstemmed | Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy |
| title_short | Magnetism and Thermal Transport of Exchange-Spring-Coupled La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub>/La<sub>2</sub>MnCoO<sub>6</sub> Superlattices with Perpendicular Magnetic Anisotropy |
| title_sort | magnetism and thermal transport of exchange spring coupled la sub 2 3 sub sr sub 1 3 sub mno sub 3 sub la sub 2 sub mncoo sub 6 sub superlattices with perpendicular magnetic anisotropy |
| topic | superlattices high-resolution STEM exchange spring magnet perpendicular magnetic anisotropy magneto-thermal conductivity |
| url | https://www.mdpi.com/2079-4991/13/21/2897 |
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