Formation of Pancakelike Ising Domains and Giant Magnetic Coercivity in Ferrimagnetic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>LuFe</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>
Weida Wu(Rutgers, The State University of New Jersey), V. Kiryukhin(Rutgers, The State University of New Jersey), H.‐J. Noh(Pohang University of Science and Technology), Kyung‐Tae Ko(Pohang University of Science and Technology), Jae‐Hoon Park(Pohang University of Science and Technology), William Ratcliff(NIST Center for Neutron Research), Puneet Sharma(Los Alamos National Security (United States)), N. Harrison(Los Alamos National Security (United States)), Young Jai Choi(Rutgers, The State University of New Jersey), Y. Horibe(Rutgers, The State University of New Jersey), S. Lee(Rutgers, The State University of New Jersey), Sehyun Park(Rutgers, The State University of New Jersey), Hee Taek Yi(Rutgers, The State University of New Jersey), C. L. Zhang(Rutgers, The State University of New Jersey), Sang‐Wook Cheong(Rutgers, The State University of New Jersey)
Cited by 103Open Access
Abstract
We have studied quasi-two-dimensional multiferroic LuFe2O4 with strong charge-spin-lattice coupling, in which low-temperature coercivity approaches an extraordinary value of 9 T in single crystals. The enhancement of the coercivity is connected to the collective freezing of nanoscale pancakelike ferrimagnetic domains with large uniaxial magnetic anisotropy ("Ising pancakes"). Our results suggest that collective freezing in low-dimensional magnets with large uniaxial anisotropy provides an effective mechanism to achieve enhanced coercivity. This observation may help identify novel approaches for synthesis of magnets with enhanced properties.
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