TY - JOUR
T1 - Nanocrystallization behavior and magnetic properties of amorphous Fe78Si9B13 ribbons
AU - Sun, Xiangcheng
AU - Cabral-Prieto, A.
AU - Jose Yacaman, M.
AU - Reyes-Gasga, J.
AU - Hernandez-Reyes, R.
AU - Morales, A.
AU - Sun, Wensheng
N1 - Funding Information:
The present work is financially supported by CONACyT projects through “Quantum Colliods” in Mexico. The authors are grateful to Mr. C. Rodriguez for DSC measurements and Ms. Thelma at XRD analysis.
PY - 2000/8
Y1 - 2000/8
N2 - The amorphous state of ferromagnetic Fe78Si9B13 ribbons and its nanocrystallization were investigated by in situ transmission electron microscope (TEM), X-ray diffraction (XRD), Mossbauer spectroscopy (MS), differential scanning calorimeters (DSC) and magnetic moment measurements. The Mossbauer spectrum exhibited an essentially symmetric hyperfine field pattern of 259 kOe in as-quenched amorphous state at room temperature. The Curie and crystallization temperature were determined to be Tc = 708 K and Tx = 803 K, respectively. The Tx value was in good agreement with DSC measurement results. The occupied fraction of the nanocrystalline phases of α-Fe(Si) and Fe2B at in situ optimum annealing temperature was about 57% and 43%, respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of nanocrystalline ferromagnetism, suggesting the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents.
AB - The amorphous state of ferromagnetic Fe78Si9B13 ribbons and its nanocrystallization were investigated by in situ transmission electron microscope (TEM), X-ray diffraction (XRD), Mossbauer spectroscopy (MS), differential scanning calorimeters (DSC) and magnetic moment measurements. The Mossbauer spectrum exhibited an essentially symmetric hyperfine field pattern of 259 kOe in as-quenched amorphous state at room temperature. The Curie and crystallization temperature were determined to be Tc = 708 K and Tx = 803 K, respectively. The Tx value was in good agreement with DSC measurement results. The occupied fraction of the nanocrystalline phases of α-Fe(Si) and Fe2B at in situ optimum annealing temperature was about 57% and 43%, respectively. It is notable that the magnetization of the amorphous phase decreases more rapidly with increasing temperature than those of nanocrystalline ferromagnetism, suggesting the presence of the distribution of exchange interaction in the amorphous phase or high metalloid contents.
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U2 - 10.1016/S0921-4526(99)01241-7
DO - 10.1016/S0921-4526(99)01241-7
M3 - Article
AN - SCOPUS:0034250867
SN - 0921-4526
VL - 291
SP - 173
EP - 179
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-2
ER -