title: The effect of A-site substitution of Ce and La on the magnetic and electronic properties of Sr(Ti0.6Fe0.4)O(3-δ) films.
abstract: The structure and magnetic properties of epitaxial (Ce(x)Sr(1-x))(Ti(0.6)Fe(0.4))O(3-δ) (x = 0, 0.1, 0.2 and 0.3) and (La(x)Sr(1-x))(Ti(0.6)Fe(0.4))O(3-δ) (x = 0, 0.1, 0.2, 0.3 and 0.4) perovskite-structure thin films deposited by pulsed laser deposition on (LaAlO(3))(0.3)(Sr(2)AlTaO(6))(0.7) (LSAT) substrates are reported. Both La and Ce ions showed a dominant 3+ valence state and acted as donors on the Sr(2+) site (A site) in the perovskite lattice. The optical band gap widened, and the Fermi level moved toward the vacuum level with increased Ce or La content; meanwhile the Ti and particularly the Fe ions were driven to a lower valence state, resulting in a higher Fe(2+) concentration. The materials were magnetic at room temperature with up to 0.8 μ(B)/Fe and a magnetoelastic out-of-plane anisotropy. Ce and La lowered the coercivity while raising both the Faraday rotation at 1550 nm and the optical absorption at near-infrared wavelengths.
authors.affiliation: Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, People's Republic of China. peng0469@gmail.com
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.forename: Lei
authors.initials: L
authors.lastname: Bi
authors.forename: Xueyin
authors.initials: X
authors.lastname: Sun
authors.forename: Dong Hun
authors.initials: DH
authors.lastname: Kim
authors.forename: Daming
authors.initials: D
authors.lastname: Jiang
authors.forename: Gaohui
authors.initials: G
authors.lastname: Wu
authors.forename: G F
authors.initials: GF
authors.lastname: Dionne
authors.forename: C A
authors.initials: CA
authors.lastname: Ross