Kulkarni, G U; Kannan, K R; Arunarkavalli, T; Rao, C N R
(American Physical Society, 1994-01-01)
57Fe Mössbauer measurements show that the Tc of 〈12〉-nm particles of MnFe2O4 is higher than that of the 〈33〉-nm particles, which exhibit the bulk Tc value (573 K). The 57Fe isomer shift as well as the internal field are, ...