Gigantic magnetic-field-induced polarization and magnetoelectric coupling in a ferrimagnetic oxide CaBaCo ${}_4$ O ${}_7$

Journal Article · Fri Nov 01 00:00:00 EDT 2013 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.88.174403· OSTI ID:1392315

Caignaert, V.; Maignan, A.; Singh, K.; Simon, Ch.; Pralong, V.; Raveau, B.; Mitchell, J. F.; Zheng, H.; Huq, A.; Chapon, L. C.

Below Tc, the single-crystal study of CaBaCo40,, a noncollinear ferrimagnet (Tc = 64 K) with a polar orthorhombic space group (Pbn21) between 4 and 293 K, shows a large change inthe electric polarization along its c axis reaching !!iP = 17 mC/m2 at 10 K. At 62.5 K, a magnetic-field-driven giant variation inpolarization P(9 T) - P(O T) = 8 mC/m2 is observed. Moreover, the present magnetoelectric measurements are fully consistent withthe m'm2' magnetic point group. This ferrimagnetic oxide, which belongs to the "114" structural family, opens an avenue for the search for new magnetoelectrics.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1392315
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 88, Issue 17; ISSN 1098-0121
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English