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Multiferroic h-HoMnO₃의 자기적 성질 연구
김성백(Sung Baek Kim),금복연(Bok Yeon Kum),김철성(Chul Sung Kim),안성용(Sung Yong An),N. Hur(N. Hur),S. Park(S. Park),S.-W. Cheong(S.-W. Cheong),장광현(Kwang-Hyun Jang),박제근(J.-G. Park) 한국자기학회 2005 韓國磁氣學會誌 Vol.15 No.2
Multiferroic HoMnO₃ single crystal was prepared using 4-point focused floating zone furnace, and polycrystalline HoMn_(1-x)(57)^Fe_xO₃ (x=0.00, 0.01, 0.02, 0.05) powders have been prepared by solid state reaction. Their magnetic and crystallographic properties are studied using MPMS, PPMS, and Mossbauer spectroscopy. The crystal structure is found to be a hexagonal and a magnetic easy-axis is (110) direction. As the external applied magnetic field increases, temperature of the dielectric constant anomaly is decreased. HoMn_(0.95)(57)^Fe_(0.05)O₃ shows huge quadrupole splitting value from the Mossbauer spectra.