Visualizing weak ferromagnetic domains in multiferroic hexagonal ferrite thin film

Wenbo Wang, Julia A. Mundy, Charles M. Brooks, Jarrett A. Moyer, Megan E. Holtz, David A. Muller, Darrell G. Schlom, Weida Wu

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We report cryogenic magnetic force microscopy (MFM) studies of a 200-nm-thick hexagonal (h) LuFeO3 film grown by molecular-beam epitaxy on a (111)-oriented yttria-stabilized cubic-zirconia substrate. Labyrinthlike domains ∼1.8μm in size were observed after zero-field cooling below the Néel temperature, TN≈147 K, where weak ferromagnetic order (P63cm) with a canted moment of MS≈0.02μB/f.u. exists. At 6 K, MFM images of the magnetization reversal process reveal a typical domain behavior of a pinning-dominated hard magnet. The pinning strength is substantially reduced at elevated temperature. The temperature dependence of the domain contrast demonstrates that our MFM is able to detect the domain contrast of magnets with tiny magnetic moments (∼0.002μB/f.u.). An upper limit of the linear magnetoelectric coefficient of h-LuFeO3 (αzz<6ps/m) is estimated by magnetoelectric force microscopy measurements.

Original languageEnglish (US)
Article number134443
JournalPhysical Review B
Volume95
Issue number13
DOIs
StatePublished - Apr 26 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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