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Title: Soft mode characteristics of up-up-down-down spin chains: The role of exchange interactions on lattice dynamics

In this work, the dynamics of a diatomic chain is investigated with ↑↑↓↓ spin order in which the dispersion relation characterizes the effect of magnetic interactions on the lattice dynamics. The optical or acoustic mode softening in the center or boundary of the Brillouin zone can be observed, indicating the transitions of ferroelectric state, antiferromagnetic state, or ferroelastic state. The coexistence of the multiferroic orders related to the ↑↑↓↓ spin order represents a type of intrinsic multiferroic with strong ferroelectric order and different microscopic mechanisms.
Authors:
 [1] ;  [2] ; ;  [1] ;  [3] ; ;  [4]
  1. School of Physics and Electronic Engineering, Jiangsu Second Normal University, Nanjing 210013 (China)
  2. (China)
  3. College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003 (China)
  4. Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)
Publication Date:
OSTI Identifier:
22410117
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; BRILLOUIN ZONES; DISPERSION RELATIONS; EXCHANGE INTERACTIONS; FERROELECTRIC MATERIALS; PHASE TRANSFORMATIONS; SPIN