TY - JOUR
T1 - Mössbauer spectroscopy in the system (Nd1-xCex)1.1Fe10CoTi with ThMn12 structure
AU - Sánchez, Hugo Martínez
AU - Salazar, Daniel
AU - Zamora, Ligia Edith
AU - Hernandez, Juan Sebastian Trujillo
AU - Tabares, Jesús Anselmo
AU - Alcázar, German Antonio Pérez
PY - 2020/12/1
Y1 - 2020/12/1
N2 - In this work, we examined the effects of the of Nd by Ce substitution and of the nitrogenation in the structural and hyperfine magnetic properties of (Nd1-xCex)1.1Fe10CoTi with x = 0, 0.5 and 1 systems. The alloys were prepared, with high pure elements, by arc-melting and the pieces were then homogenized at 1100 °C for 48 h. The nitrogenation was carried out at 450 °C for 1 h with a pressure of 0.1 MPa. The X-ray diffraction analysis allowed to identify the ThMn12-type structure mainly with average weigh fraction of 68%. The obtained tetragonal ThMn12 structure type presented an increased lattice parameter after nitrogenation for all alloys. The rhombohedral structure Th2Zn17-type is also present in the alloys and their lattice parameters do not show important changes after the nitrogenation. The Mössbauer spectra were fitted with seven sextets and a small quadrupolar component, the sextets were associated to the Fe sites in the ThMn12-type and Th2Zn17-type phases. The mean field, 〈Bhf〉, improve for all alloys after nitrogenation process. The Nd1.1Fe10CoTi (x = 0) and (Nd0.5Ce0.5)1.1Fe10CoTi (x = 0.5) alloys that present weigh fractions of 75 and 73%, respectively, with the ThMn12−type tetragonal structure present a 〈Bhf〉 of 30.9 and 31.0 T, respectively, after nitrogenation. Then, they can be possible candidates for rare earth-lean permanent magnets.
AB - In this work, we examined the effects of the of Nd by Ce substitution and of the nitrogenation in the structural and hyperfine magnetic properties of (Nd1-xCex)1.1Fe10CoTi with x = 0, 0.5 and 1 systems. The alloys were prepared, with high pure elements, by arc-melting and the pieces were then homogenized at 1100 °C for 48 h. The nitrogenation was carried out at 450 °C for 1 h with a pressure of 0.1 MPa. The X-ray diffraction analysis allowed to identify the ThMn12-type structure mainly with average weigh fraction of 68%. The obtained tetragonal ThMn12 structure type presented an increased lattice parameter after nitrogenation for all alloys. The rhombohedral structure Th2Zn17-type is also present in the alloys and their lattice parameters do not show important changes after the nitrogenation. The Mössbauer spectra were fitted with seven sextets and a small quadrupolar component, the sextets were associated to the Fe sites in the ThMn12-type and Th2Zn17-type phases. The mean field, 〈Bhf〉, improve for all alloys after nitrogenation process. The Nd1.1Fe10CoTi (x = 0) and (Nd0.5Ce0.5)1.1Fe10CoTi (x = 0.5) alloys that present weigh fractions of 75 and 73%, respectively, with the ThMn12−type tetragonal structure present a 〈Bhf〉 of 30.9 and 31.0 T, respectively, after nitrogenation. Then, they can be possible candidates for rare earth-lean permanent magnets.
KW - Mössbauer spectroscopy
KW - Nitrogenation
KW - ThMn12-type structure
KW - X-ray diffraction
UR - https://www.mendeley.com/catalogue/92c790a3-57e5-32c7-aafd-ec1795948a34/
U2 - 10.1007/s10751-020-01716-0
DO - 10.1007/s10751-020-01716-0
M3 - Article
VL - 241
JO - Hyperfine Interactions
JF - Hyperfine Interactions
SN - 0304-3843
IS - 1
ER -