TY - JOUR
T1 - Exchange-coupled FePtB nano-composite hard magnets produced by pulsed laser deposition
AU - Kaushik, Neelam
AU - Sharma, Parmanand
AU - Nagar, Sandeep
AU - Rao, K. V.
AU - Kimura, Hisamichi
AU - Makino, Akihiro
AU - Inoue, Akihisa
PY - 2010/7/25
Y1 - 2010/7/25
N2 - Nano-composite FePtB thin films were deposited on naturally oxidized (1 0 0) silicon (Si) and glass (SiO2) substrates by using a pulsed laser deposition (PLD) technique. Effects of processing conditions on structural, surface and magnetic properties of the films were examined. Growth temperature (Ts) and the type of substrate (Si or SiO2) are shown to affect crystal structure and magnetic properties of FePtB thin films significantly. Under optimized processing conditions, a ∼1.7 μm thick FePtB film deposited on a glass substrate exhibits high coercivity (∼7.7 kOe), high reduced remanence [(Mr/Ms) ∼ 0.9] and high energy product (BH)max = 71 kJ/m3. The films exhibiting good hard magnetic properties are mainly made-up of nano-sized hard (L10-FePt) and soft (iron-boride) magnetic phases, which are shown to be exchange coupled. Fabrication of hard magnetic thin films by a simple and fast technique such as PLD is very promising for the production of micro magnets for MEMS applications.
AB - Nano-composite FePtB thin films were deposited on naturally oxidized (1 0 0) silicon (Si) and glass (SiO2) substrates by using a pulsed laser deposition (PLD) technique. Effects of processing conditions on structural, surface and magnetic properties of the films were examined. Growth temperature (Ts) and the type of substrate (Si or SiO2) are shown to affect crystal structure and magnetic properties of FePtB thin films significantly. Under optimized processing conditions, a ∼1.7 μm thick FePtB film deposited on a glass substrate exhibits high coercivity (∼7.7 kOe), high reduced remanence [(Mr/Ms) ∼ 0.9] and high energy product (BH)max = 71 kJ/m3. The films exhibiting good hard magnetic properties are mainly made-up of nano-sized hard (L10-FePt) and soft (iron-boride) magnetic phases, which are shown to be exchange coupled. Fabrication of hard magnetic thin films by a simple and fast technique such as PLD is very promising for the production of micro magnets for MEMS applications.
KW - Exchange-coupled magnets
KW - FePtB thin films
KW - Hard magnetic material
KW - Nano-composite magnet
KW - Pulsed laser deposition
KW - Thin films
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UR - http://www.scopus.com/inward/citedby.url?scp=77953158167&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2010.03.070
DO - 10.1016/j.mseb.2010.03.070
M3 - Article
AN - SCOPUS:77953158167
VL - 171
SP - 62
EP - 68
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
SN - 0921-5107
IS - 1-3
ER -