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Tunable multiferroic order parameters in S r1-x BaxM n1-y TiyO3

Journal Article · · Physical Review Materials
 [1];  [1];  [1];  [2];  [3];  [3];  [4];  [2];  [2];  [5];  [6];  [6];  [7];  [2];  [5];  [8]
  1. Northern Illinois Univ., DeKalb, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Carnegie Inst. of Washington, Washington, DC (United States); Center for High Pressure Science and Technology Advanced Research, Beijing (China)
  5. Polish Academy of Sciences, Warsaw (Poland)
  6. Polish Academy of Sciences, Poznan (Poland)
  7. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  8. Northern Illinois Univ., DeKalb, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States)
Responding to the rapidly increasing demand for efficient energy usage and increased speed and functionality of electronic and spintronic devices, multiferroic oxides have recently emerged as key materials capable of tackling this multifaceted challenge. In this paper, we describe the development of single-site manganese-based multiferroic perovskite materials with modest amounts of nonmagnetic Ti substituted at the magnetic Mn site in Sr1-xBaxMn1-yTiyO3 (SBMTO). Significantly enhanced properties were achieved with ferroelectric-type structural transition temperatures boosted to ~430 K. Ferroelectric distortions with large spontaneous polarization values of ~30 mu C cm2, derived from a point charge model, are similar in magnitude to those of the prototypical nonmagnetic BaTiO3. Temperature dependence of the system's properties was investigated by synchrotron x-ray powder diffraction and neutron powder diffraction at ambient and high pressures. Various relationships were determined between the structural and magnetic properties, Ba and Ti contents, and TN and TC. Most importantly, our results demonstrate the large coupling between the magnetic and ferroelectric order parameters and the wide tunability of this coupling by slight variations of the material's stoichiometry.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357; AC05-00OR22725
OSTI ID:
1559937
Alternate ID(s):
OSTI ID: 1606702
OSTI ID: 1546839
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 8 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (11)


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