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Polarity-tunable magnetic tunnel junctions based on ferromagnetism at oxide heterointerfaces.
Ngo, Thach D N; Chang, Jung-Won; Lee, Kyujoon; Han, Seungju; Lee, Joon Sung; Kim, Young Heon; Jung, Myung-Hwa; Doh, Yong-Joo; Choi, Mahn-Soo; Song, Jonghyun; Kim, Jinhee.
Afiliación
  • Ngo TDN; Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
  • Chang JW; Department of Nanoscience, Korea University of Science and Technology, Daejeon 305-350, Korea.
  • Lee K; Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
  • Han S; Department of Applied Physics, Korea University Sejong Campus, Sejong 339-700, Korea.
  • Lee JS; Department of Physics, Sogang University, Seoul 121-742, Korea.
  • Kim YH; Department of Physics, Korea University, Seoul 136-713, Korea.
  • Jung MH; Department of Applied Physics, Korea University Sejong Campus, Sejong 339-700, Korea.
  • Doh YJ; Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
  • Choi MS; Department of Physics, Sogang University, Seoul 121-742, Korea.
  • Song J; Department of Applied Physics, Korea University Sejong Campus, Sejong 339-700, Korea.
  • Kim J; Department of Physics, Korea University, Seoul 136-713, Korea.
Nat Commun ; 6: 8035, 2015 Aug 13.
Article en En | MEDLINE | ID: mdl-26268611
Complex oxide systems have attracted considerable attention because of their fascinating properties, including the magnetic ordering at the conducting interface between two band insulators, such as LaAlO3 and SrTiO3. However, the manipulation of the spin degree of freedom at the LaAlO3/SrTiO3 heterointerface has remained elusive. Here, we have fabricated hybrid magnetic tunnel junctions consisting of Co and LaAlO3/SrTiO3 ferromagnets with the insertion of a Ti layer in between, which clearly exhibit magnetic switching and the tunnelling magnetoresistance effect below 10 K. The magnitude and sign of the tunnelling magnetoresistance are strongly dependent on the direction of the rotational magnetic field parallel to the LaAlO3/SrTiO3 plane, which is attributed to a strong Rashba-type spin-orbit coupling in the LaAlO3/SrTiO3 heterostructure. Our study provides a further support for the existence of the macroscopic ferromagnetism at LaAlO3/SrTiO3 heterointerfaces and opens a novel route to realize interfacial spintronics devices.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido