skip to main content

Title: Structural, magnetic, and electronic properties of GdTiO{sub 3} Mott insulator thin films grown by pulsed laser deposition

We report on the optimization process to synthesize epitaxial thin films of GdTiO{sub 3} on SrLaGaO{sub 4} substrates by pulsed laser deposition. Optimized films are free of impurity phases and are fully strained. They possess a magnetic Curie temperature T{sub C} = 31.8 K with a saturation magnetization of 4.2 μ{sub B} per formula unit at 10 K. Transport measurements reveal an insulating response, as expected. Optical spectroscopy indicates a band gap of ∼0.7 eV, comparable to the bulk value. Our work adds ferrimagnetic orthotitanates to the palette of perovskite materials for the design of emergent strongly correlated states at oxide interfaces using a versatile growth technique such as pulsed laser deposition.
Authors:
; ; ; ; ;  [1] ;  [2] ;  [3] ;  [4] ;  [2]
  1. Unité Mixte de Physique, CNRS-Thales, 1 Av. Augustin Fresnel, Campus de l'Ecole Polytechnique, 91120 Palaiseau, France and Université Paris-Sud, 91405 Orsay (France)
  2. Physics Department and Institute for Nanoscience and Engineering, University of Arkansas, Fayetteville, Arkansas 72701 (United States)
  3. (China)
  4. Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
Publication Date:
OSTI Identifier:
22310659
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL GROWTH; CURIE POINT; ENERGY BEAM DEPOSITION; EPITAXY; GADOLINIUM COMPOUNDS; GALLIUM COMPOUNDS; IMPURITIES; LANTHANUM COMPOUNDS; LASER RADIATION; MAGNETIZATION; OXYGEN COMPOUNDS; PEROVSKITE; PULSED IRRADIATION; SATURATION; SPECTROSCOPY; STRONTIUM COMPOUNDS; SUBSTRATES; TEMPERATURE RANGE 0013-0065 K; THIN FILMS; TITANATES