TY - JOUR
T1 - Orientation control in L1 0 FePt films by using magnetic field annealing around Curie temperature
AU - Liu, Liwang
AU - Lv, Hua
AU - Sheng, Wei
AU - Lou, Yuanfu
AU - Bai, Jianmin
AU - Cao, Jiangwei
AU - Ma, Bin
AU - Wei, Fulin
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant No. 6080 3035 ).
PY - 2012/5/15
Y1 - 2012/5/15
N2 - A new method to improve (0 0 1) texture of L1 0 FePt films was reported. In this work, in order to obtain the perpendicular orientation of L1 0 FePt films, the FePt films were annealed at 700°C (T A1 ) for 30 min and then annealed at T A2 (430-600°C) for an hour either in a magnetic field of ∼3500 Oe along the normal direction of the films (Route A) or without magnetic field (Route B). Compared with the Route B, I (0 0 1) /I (1 1 1) showed a peak value of 7 when T A2 was around 478°C (around the Curie temperature of L1 0 FePt films) and the AFM image of FePt sample was annealed around 478°C showed an obvious change of grains through Route A. It is related to the following reason: when the temperature is near Curie temperature of L1 0 FePt films, the thermal disturbing term is close to the exchange energy of the magnetization, therefore, the magnetic field of ∼3500 Oe is effective for promoting the preferential growth direction of L1 0 structure.
AB - A new method to improve (0 0 1) texture of L1 0 FePt films was reported. In this work, in order to obtain the perpendicular orientation of L1 0 FePt films, the FePt films were annealed at 700°C (T A1 ) for 30 min and then annealed at T A2 (430-600°C) for an hour either in a magnetic field of ∼3500 Oe along the normal direction of the films (Route A) or without magnetic field (Route B). Compared with the Route B, I (0 0 1) /I (1 1 1) showed a peak value of 7 when T A2 was around 478°C (around the Curie temperature of L1 0 FePt films) and the AFM image of FePt sample was annealed around 478°C showed an obvious change of grains through Route A. It is related to the following reason: when the temperature is near Curie temperature of L1 0 FePt films, the thermal disturbing term is close to the exchange energy of the magnetization, therefore, the magnetic field of ∼3500 Oe is effective for promoting the preferential growth direction of L1 0 structure.
KW - Curie temperature
KW - Exchange energy
KW - FePt
KW - Magnetic field annealing
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U2 - 10.1016/j.apsusc.2012.02.090
DO - 10.1016/j.apsusc.2012.02.090
M3 - Article
AN - SCOPUS:84862785005
SN - 0169-4332
VL - 258
SP - 5770
EP - 5773
JO - Applied Surface Science
JF - Applied Surface Science
IS - 15
ER -