title: In Situ Tuning of Magnetization and Magnetoresistance in Fe3O4 Thin Film Achieved with All-Solid-State Redox Device.
abstract: An all-solid-state redox device composed of Fe3O4 thin film and Li(+) ion conducting solid electrolyte was fabricated for use in tuning magnetization and magnetoresistance (MR), which are key factors in the creation of high-density magnetic storage devices. Electrical conductivity, magnetization, and MR were reversibly tuned by Li(+) insertion and removal. Tuning of the various Fe3O4 thin film properties was achieved by donation of an electron to the Fe(3+) ions. This technique should lead to the development of spintronics devices based on the reversible switching of magnetization and spin polarization (P). It should also improve the performance of conventional magnetic random access memory (MRAM) devices in which the ON/OFF ratio has been limited to a small value due to a decrease in P near the tunnel barrier.
authors.affiliation: International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS) ,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.|Department of Applied Physics, Faculty of Science, Tokyo University of Science , 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Tsuchiya
authors.affiliation: International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS) ,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Kazuya
authors.initials: K
authors.lastname: Terabe
authors.affiliation: Department of Applied Physics, Faculty of Science, Tokyo University of Science , 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Ochi
authors.affiliation: Department of Applied Physics, Faculty of Science, Tokyo University of Science , 6-3-1, Niijuku, Katsushika-ku, Tokyo 125-8585, Japan.
authors.forename: Tohru
authors.initials: T
authors.lastname: Higuchi
authors.affiliation: International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS) ,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Minoru
authors.initials: M
authors.lastname: Osada
authors.affiliation: International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS) ,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Yamashita
authors.affiliation: Quantum Beam Unit, National Institute for Materials Science (NIMS) , 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.|Synchrotron X-ray Station at SPring-8, National Institute for Materials Science , 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Shigenori
authors.initials: S
authors.lastname: Ueda
authors.affiliation: International Center for Materials Nanoarchitechtonics (WPI-MANA), National Institute for Materials Science (NIMS) ,1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Aono
keywords: all-solid-state; magnetite; magnetoresistance; nanoionics; solid state ionics