Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices
Abstract Recent theoretical studies indicated that the Curie temperature of perovskite manganite thin films can be increased by more than an order of magnitude by applying appropriate interfacial strain to control orbital ordering. In this work, we demonstrate that the regular intercalation of BaTiO...
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SpringerOpen
2018-01-01
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| Series: | Nanoscale Research Letters |
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| Online Access: | http://link.springer.com/article/10.1186/s11671-018-2441-5 |
| _version_ | 1797720879110553600 |
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| author | Fei Zhang Biao Wu Guowei Zhou Zhi-Yong Quan Xiao-Hong Xu |
| author_facet | Fei Zhang Biao Wu Guowei Zhou Zhi-Yong Quan Xiao-Hong Xu |
| author_sort | Fei Zhang |
| collection | DOAJ |
| description | Abstract Recent theoretical studies indicated that the Curie temperature of perovskite manganite thin films can be increased by more than an order of magnitude by applying appropriate interfacial strain to control orbital ordering. In this work, we demonstrate that the regular intercalation of BaTiO3 layers between La0.67Sr0.33MnO3 layers effectively enhances ferromagnetic order and increases the Curie temperature of La0.67Sr0.33MnO3/BaTiO3 superlattices. The preferential orbital occupancy of eg(x 2 –y 2 ) in La0.67Sr0.33MnO3 layers induced by the tensile strain of BaTiO3 layers is identified by X-ray linear dichroism measurements. Our results reveal that controlling orbital ordering can effectively improve the Curie temperature of La0.67Sr0.33MnO3 films and that in-plane orbital occupancy is beneficial to the double exchange ferromagnetic coupling of thin-film samples. These findings create new opportunities for the design and control of magnetism in artificial structures and pave the way to a variety of novel magnetoelectronic applications that operate far above room temperature. |
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| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T09:26:54Z |
| publishDate | 2018-01-01 |
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| series | Nanoscale Research Letters |
| spelling | doaj.art-03b2ebd2af024af3846fdc54de3f15d52023-09-02T14:09:37ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2018-01-011311710.1186/s11671-018-2441-5Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 SuperlatticesFei Zhang0Biao Wu1Guowei Zhou2Zhi-Yong Quan3Xiao-Hong Xu4Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal UniversityKey Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal UniversityKey Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal UniversityKey Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal UniversityKey Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemistry and Materials Science, Shanxi Normal UniversityAbstract Recent theoretical studies indicated that the Curie temperature of perovskite manganite thin films can be increased by more than an order of magnitude by applying appropriate interfacial strain to control orbital ordering. In this work, we demonstrate that the regular intercalation of BaTiO3 layers between La0.67Sr0.33MnO3 layers effectively enhances ferromagnetic order and increases the Curie temperature of La0.67Sr0.33MnO3/BaTiO3 superlattices. The preferential orbital occupancy of eg(x 2 –y 2 ) in La0.67Sr0.33MnO3 layers induced by the tensile strain of BaTiO3 layers is identified by X-ray linear dichroism measurements. Our results reveal that controlling orbital ordering can effectively improve the Curie temperature of La0.67Sr0.33MnO3 films and that in-plane orbital occupancy is beneficial to the double exchange ferromagnetic coupling of thin-film samples. These findings create new opportunities for the design and control of magnetism in artificial structures and pave the way to a variety of novel magnetoelectronic applications that operate far above room temperature.http://link.springer.com/article/10.1186/s11671-018-2441-5La0.67Sr0.33MnO3/BaTiO3 superlatticesHigh Curie temperatureOrbital orderingTensile strain |
| spellingShingle | Fei Zhang Biao Wu Guowei Zhou Zhi-Yong Quan Xiao-Hong Xu Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices Nanoscale Research Letters La0.67Sr0.33MnO3/BaTiO3 superlattices High Curie temperature Orbital ordering Tensile strain |
| title | Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices |
| title_full | Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices |
| title_fullStr | Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices |
| title_full_unstemmed | Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices |
| title_short | Increased Curie Temperature Induced by Orbital Ordering in La0.67Sr0.33MnO3/BaTiO3 Superlattices |
| title_sort | increased curie temperature induced by orbital ordering in la0 67sr0 33mno3 batio3 superlattices |
| topic | La0.67Sr0.33MnO3/BaTiO3 superlattices High Curie temperature Orbital ordering Tensile strain |
| url | http://link.springer.com/article/10.1186/s11671-018-2441-5 |
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