| Autor: |
Verma, Samiksha, Sharma, Puneet, Pandey, O.P., Paesano, Andrea, Sun, An-Cheng |
| Předmět: |
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| Zdroj: |
IEEE Transactions on Magnetics; Jan2014 Part 1, Vol. 50 Issue 1, p1-4, 4p |
| Abstrakt: |
M-type Barium hexaferrite (\BaFe12{\O}19) with substitution of \Ba^2+ by rare earth metal \La^3+ were prepared by solid state synthesis method from as-prepared powder of barium monoferrite (\Ba1\-x{\La}_x{\Fe}2{\O}4) (x=0.0, 0.1 and 0.2). The structural and magnetic properties of \Ba1\-x{\La}_x{\Fe}12{\O}19 were investigated by X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and Mössbauer spectroscopy. The refined XRD patterns suggests the formation of single phase hexaferrite. With increased La substitution (x), the saturation magnetization increased and reached maximum at x=0.1 and decreased at x=0.2, without any noticeable change in coercivity. Fitted Mössbauer spectra of \Ba1\-x{\La}_x{\Fe}12{\O}19 showed increase in hyperfine field and a transition from \Fe^3+ ion to \Fe^2+ ion at 2b site. The present work demonstrates a new methodology for two stage substitution. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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