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Title: Successive Magnetic-Field-Induced Transitions and Colossal Magnetoelectric Effect in Ni3TeO6

In this paper, we report the discovery of a metamagnetic phase transition in a polar antiferromagnet Ni3TeO6 that occurs at 52 T. The new phase transition accompanies a colossal magnetoelectric effect, with a magnetic-field-induced polarization change of 0.3 μC/cm2, a value that is 4 times larger than for the spin-flop transition at 9 T in the same material, and also comparable to the largest magnetically induced polarization changes observed to date. Via density-functional calculations we construct a full microscopic model that describes the data. We model the spin structures in all fields and clarify the physics behind the 52 T transition. The high-field transition involves a competition between multiple different exchange interactions which drives the polarization change through the exchange-striction mechanism. Finally, the resultant spin structure is rather counterintuitive and complex, thus providing new insights on design principles for materials with strong magnetoelectric coupling.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [4] ;  [2] ;  [3] ;  [4]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rutgers Univ., Piscataway, NJ (United States). Rutgers Center for Emergent Materials. Dept. of Physics and Astronomy
  2. Rutgers Univ., Piscataway, NJ (United States). Dept. of Physics and Astronomy. Inst. for Advanced Materials, Devices and Nanotechnology (IAMDN)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Rutgers Univ., Piscataway, NJ (United States). Rutgers Center for Emergent Materials. Dept. of Physics and Astronomy
Publication Date:
OSTI Identifier:
1325637
Report Number(s):
LA-UR--15-26440
Journal ID: ISSN 0031-9007
Grant/Contract Number:
AC52-06NA25396; BES FWP LANLF100; DMR-1157490; DMREF 12-33349
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Rutgers Univ., Piscataway, NJ (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF) (United States); State of Florida (United States); Rutgers Univ. (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE High Magnetic Field Science