Magnetic and Mössbauer Studies of a New Compound YFe2O4

Magnetic and Mossbauer measurements were done between 77 and 300 K on polycrystalline sample of YFe 2 O 4 (Y 3+ Fe 2+ Fe 3+ O 4 2- ). This compound shows an “induced parastic ferromagnetism”: Weak ferromagnetic moment (∼2 emu/g) was induced below 240 K by applying external field (∼7 kOe) and an uniaxial anisotropy was induced by cooling the sample from 300 K to 77 K in the presence of external field. Mossbauer spectrum of Fe 57 showed a magnetic pattern with internal field of ca. 460 kOe at 90 K, and showed a paramagnetic one at 300 K.