| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Effect of Terraces at the Interface on the Structural and Physical Properties of La$_{0.8}$Sr$_{0.2}$MnO$_{3}$ Thin Films |
| Ya-Qing Feng1, Kui-Juan Jin1,2**, Chen Ge1, Xu He1, Lin Gu1, Zhen-Zhong Yang1, Hai-Zhong Guo1, Qian Wan1, Meng He1, Hui-Bin Lu1, Guo-Zhen Yang1,2 |
1Institute of Physics, Chinese Academy of Sciences, Beijing 100190
2Collaborative Innovation Center of Quantum Matter, Beijing 100190
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| Cite this article: |
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Ya-Qing Feng, Kui-Juan Jin, Chen Ge et al 2016 Chin. Phys. Lett. 33 076801 |
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Abstract Employing atomic force microscopy, transmission electron microscopy and the second harmonic generation technique, we carefully explore the structural properties of 6-unit-cell-thick La$_{0.8}$Sr$_{0.2}$MnO$_{3}$ films grown on SrTiO$_{3}$ with atomically flat TiO$_{2}$-terminated terraces on the surface. The results clearly demonstrate that the terraces on the surface of TiO$_{2}$-terminated SrTiO$_{3}$ can improve the layer-by-layer epitaxial growth of the manganite films, which results in uniform film coverage at the beginning of growth and thus reduces the substrate-induced disorder at or near the interface. Comparing the magnetic and transport properties of La$_{0.8}$Sr$_{0.2}$MnO$_{3}$ films with the thicknesses varying from 6 unit cells to 80 unit cells grown respectively on as-received SrTiO$_{3}$ and TiO$_{2}$-terminated SrTiO$_{3}$, it is found that these atomically flat terraces on the surface of TiO$_{2}$-terminated SrTiO$_{3}$ can greatly enhance the Curie temperature and conductivities of the ultrathin La$_{0.8}$Sr$_{0.2}$MnO$_{3}$ films with thickness less than 50 unit cells, while no obvious difference is detected in the magnetic and transport properties of the 80 unit-cell thick films.
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Received: 21 March 2016
Published: 01 August 2016
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| PACS: |
68.35.Ct
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(Interface structure and roughness)
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75.75.-c
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(Magnetic properties of nanostructures)
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73.63.-b
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(Electronic transport in nanoscale materials and structures)
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68.37.Lp
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(Transmission electron microscopy (TEM))
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| [1] | Jiang Q D and Zegenhagen J 1995 Surf. Sci. 338 L882 | | [2] | Silly F and Castell M R 2005 Appl. Phys. Lett. 87 213107 | | [3] | Wang X, Fei Y Y, Lu H B, Jin K J, Zhu X D, Chen Z H, Zhou Y L and Yang G Z 2005 Sci. Chin. Ser. G 48 459 | | [4] | Bibes M, Valencia S, Balcells L, Martínez B, Fontcuberta J, Wojcik M, Nadolski S and Jedryka E 2002 Phys. Rev. B 66 134416 | | [5] | Seo S S A, Choi W S, Lee H N, Yu L, Kim K W, Bernhard C and Noh T W 2007 Phys. Rev. Lett. 99 266801 | | [6] | Kim J S, Seo S S A, Chisholm M F, Kremer R K, Habermeier H U, Keimer B and Lee H N 2010 Phys. Rev. B 82 201407 | | [7] | Ohtomo A and Hwang H Y 2004 Nature 427 423 | | [8] | Dikin D A, Mehta M, Bark C W, Folkman C M, Eom C B and Chandrasekhar V 2011 Phys. Rev. Lett. 107 056802 | | [9] | Ohtomo A, Muller D A, Grazul J L and Hwang H Y 2002 Nature 419 378 | | [10] | Biscaras J, Bergeal N, Kushwaha A, Wolf T, Rastogi A, Budhani R C and Lesueur J 2010 Nat. Commun. 1 89 | | [11] | Wang M, Ou Y B, Li F S, Zhang W H, Tang C J, Wang L L, Xue Q K and Ma X C 2014 Acta Phys. Sin. 63 027401 | | [12] | Padhan P, Pandey N K, Srivastava S, Rakshit R K, Kulkarni V N and Budhani R C 2000 Solid State Commun. 117 27 | | [13] | Zhao R Q, Jin K J, Guo H Z, Lu H B and Yang G Z 2013 Sci. Chin. Phys. Mech. Astron. 56 2370 | | [14] | Fontcuberta J, Skumryev V, Laukhin V, Granados X and Salje E K H 2015 Sci. Rep. 5 13784 | | [15] | Salje E K H, Aktas O, Carpenter M A, Laguta V V and Scott J F 2013 Phys. Rev. Lett. 111 247603 | | [16] | Rondinelli J M, May S J and Freeland J M 2012 MRS Bull. 37 261 | | [17] | Feng Y Q, Jin K J, Gu L, He X, Ge C, Zhang Q H, He M, Guo Q L, Wan Q, He M, Lu H B and Yang G Z 2016 Sci. Rep. 6 22382 | | [18] | Pesquera D, Skumryev V, Sanchez F, Herranz G and Fontcuberta J 2011 Phys. Rev. B 84 184412 | | [19] | Wang C, Jin K J, Gu L, Lu H B, Li S M, Zhou W J, Zhao R Q, Guo H Z, He M and Yang G Z 2013 Appl. Phys. Lett. 102 252401 | | [20] | Urushibara A, Moritomo Y, Arima T, Asamitsu A, Kido G and Tokura Y 1995 Phys. Rev. B 51 14103 | | [21] | Luo Z Y, Tang J, Ma B, Zhang Z Z, Jin Q Y and Wang J P 2012 Chin. Phys. Lett. 29 127501 | | [22] | Ge C, Jin K J, Gu L, Peng L C, Hu Y S, Guo H Z, Shi H F, Li J K, Wang J O, Guo X X, Wang C and He M 2015 Adv. Mater. Interfaces 2 1500407 | | [23] | Moreo A, Mayr M, Feiguin A, Yunoki S and Dagotto E 2000 Phys. Rev. Lett. 84 5568 |
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