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Title: Magnetic and ferroelectric orders in strained Gd{sub 1/2}Na{sub 1/2}TiO{sub 3}: First-principles calculations

The emergent magnetic and ferroelectric orders in A-site ordered Gd{sub 1/2}Na{sub 1/2}TiO{sub 3} under lattice strain are investigated using the first-principles calculations. It is revealed that the lattice prefers the perovskite structure with alternatively stacked Ga-O and Na-O layers along the b-axis and the ground spin state favors the G-type antiferromagnetic (G-AFM) order. The ac-plane biaxial strain can remarkably tune the amplitude of ferroelectric polarization, while the G-AFM spin structure is robustly unaffected. The ±4% strains can trigger the change of polarization up to ±50% relative to the polarization value of unstrained structure. The present work suggests a possible scenario to control emergent multiferroic behaviors in Gd{sub 1/2}Na{sub 1/2}TiO{sub 3} via lattice strain.
Authors:
 [1] ;  [2] ;  [3] ; ; ; ;  [1]
  1. Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093 (China)
  2. (China)
  3. Department of Physics, Southeast University, Nanjing 211189 (China)
Publication Date:
OSTI Identifier:
22410041
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; ANTIFERROMAGNETISM; ATOMIC FORCE MICROSCOPY; FERROELECTRIC MATERIALS; GADOLINIUM COMPOUNDS; GROUND STATES; LAYERS; POLARIZATION; SODIUM COMPOUNDS; SPIN; STRAINS; TITANATES