摘要： EuMn{sub 2}O{sub 5} multiferroic nanorods, with diameters radial × (〈L{sub C}〉) lengths of 25(6) nm × 47(15) nm and 51(16) nm × 70(26) nm, were fabricated by the hydrothermal method. Ferrimagnetic ordering below 50 K (T*) is observed in the 〈L{sub C}〉 = 70 nm sample, which exhibited ferromagnetic (FM) behavior below T* in a field cooling process. No similar behavior was found in the 〈L{sub C}〉 = 47 nm sample. These observations reveal that only the 〈L{sub C}〉 = 70 nm sample has a meta-FM state, and this sample exhibits the stronger coupling between the Mn ions. Raman spectra of both sets of samples were obtained in 0, 610, 1000, 1600, and 2000 G magnetic fields. The red-shift of the A{sub g} (681 cm{sup −1}) mode of the both samples increased with the strength of the field above 1000 G, indicating the existence of spin-phonon interaction. The smaller sampled exhibited a larger red-shift, suggesting that the size importantly affects the of EuMn{sub 2}O{sub 5} nanorods. 出版者： United States 出版日期： 2015-05-07 出處： Journal of applied physics, 2015-05, Vol.117 (17) 資源來源： AIP Journals (American Institute of Physics) 識別號： ISSN: 0021-8979 識別號： EISSN: 1089-7550 識別號： DOI: 10.1063/1.4919233
