TY - JOUR
T1 - Heat-assisted magnetization reversal using pulsed laser irradiation in patterned magnetic thin film with perpendicular anisotropy
AU - Waseda, Keita
AU - Doi, Ryosuke
AU - Purnama, Budi
AU - Yoshimura, Satoru
AU - Nozaki, Yukio
AU - Matsuyama, Kimihide
N1 - Funding Information:
This work was supported in part by the Industrial Technology Research Grant Program in 2005 from the New Energy and Industrial Technology Development Organization (NEDO) of Japan and the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (A), 20686025.
PY - 2008/11
Y1 - 2008/11
N2 - Cooling velocity of patterned Tb-Fe film with a lateral size of 50 × 50 μm2 was experimentally investigated for the application to heat-assisted writing operation in high-density magnetic random access memories. The patterned Tb-Fe film was heated-up by using pulsed YAG laser irradiations with the duration of 1 ns which is realizing a semi-adiabatic heating process. The ratio of magnetization reversal in the patterned Tb-Fe film was estimated by measuring an anomalous Hall voltage. The main results are as follows: (1) Magnetic field required for magnetization reversal of Tb-Fe film was decreased from 1.4 kOe to 200 Oe by applying the heat-assisted magnetization reversal method. (2) Cooling velocity of patterned Tb-Fe film can be estimated by using pulsed magnetic fields with various time delays from the pulsed laser irradiation. (3) With increasing the thermal conductivity coefficient of electrical leads, the velocity to cool the patterned Tb-Fe film increased.
AB - Cooling velocity of patterned Tb-Fe film with a lateral size of 50 × 50 μm2 was experimentally investigated for the application to heat-assisted writing operation in high-density magnetic random access memories. The patterned Tb-Fe film was heated-up by using pulsed YAG laser irradiations with the duration of 1 ns which is realizing a semi-adiabatic heating process. The ratio of magnetization reversal in the patterned Tb-Fe film was estimated by measuring an anomalous Hall voltage. The main results are as follows: (1) Magnetic field required for magnetization reversal of Tb-Fe film was decreased from 1.4 kOe to 200 Oe by applying the heat-assisted magnetization reversal method. (2) Cooling velocity of patterned Tb-Fe film can be estimated by using pulsed magnetic fields with various time delays from the pulsed laser irradiation. (3) With increasing the thermal conductivity coefficient of electrical leads, the velocity to cool the patterned Tb-Fe film increased.
KW - Cooling velocity
KW - Heat-assisted magnetization reversal
KW - Magnetic random access memory
KW - Patterned magnetic film
KW - Perpendicular magnetic anisotropy
KW - Pulsed laser irradiation
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U2 - 10.1109/TMAG.2008.2003068
DO - 10.1109/TMAG.2008.2003068
M3 - Article
AN - SCOPUS:77955120089
SN - 0018-9464
VL - 44
SP - 2483
EP - 2486
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 11 PART 2
ER -