Journal of the Physical Society of Japan · 1976 · 14 citations · 2 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMagnetic MaterialsSpectroscopyFerromagnetismIron OxidesMagnetic OxidesMagnetic Properties Of SolidsMagnetism In SolidsMössbauer SpectroscopyAnisotropy In FerritesFerrimagnetic OxidesMössbauer EffectParamagnetic CentersParamagnetic SpeciesPolycrystalline MaterialsTemperature-dependent Mössbauer SpectroscopyUniaxial Anisotropy
Magnetic and Mössbauer 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. Mössbauer 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.
2
A series of new compounds A3+Fe2 O4 (A = Ho, Er, Tm, Yb, and Lu)
Noboru Kimizuka, A. Takénaka, Yoshio Sasada et al. · Solid State Communications · 1974 · 69 citations