(B. MIPA Sains) Sensitive Magnetic Field Sensor Based on Compensated Double Pick Up Coil to Detect a Changed of Magnetic Field Caused by Natural Disaster.

(B. MIPA Sains)
Sensitive Magnetic Field Sensor Based on Compensated Double Pick Up Coil to Detect a
Changed of Magnetic Field Caused by Natural Disaster
Key word: flux gate sensor, flat core magnetic, Ni-Fe thin film
Purnama, Budi; Suharyana; Sutomo, Artono Dwijo
Fakultas MIPA UNS, Penelitian, DP2M Dikti, Hibah Bersaing Lanjutan, 2012
Control deposition of the Ni-Fe thin films as a candidate core flat sensitive magnetic field sensor based
on flux gate configuration has been deposited on a substrates of printed circuit board (PCB). The
magnetic thin films fabricated by electrodeposition. Percentage compositions of elemen were measured
by x-ray fluorosense (XRF). Where as surface morphology was analyzed by nano surf scanning tunneling
microscopy (STM). And magnetic property was measured by vibrating sample magnetometer (VSM).
Modification of growth parameters have been clarified could significantly affect magnetic characteristics
of the Ni-Fe thin films. Typical magnetic characteristics which are obtained were suitable for the
application of sensitive flux gate magnetic-sensor.
Magnetic characterization of the NiFe thin films described as following. When the percentage of Ni thin
films was increased so the coercive field increased. However, the saturated magnetization mS at a
concentration of 63% decrease. In the current density as a deposition parameter, a minimum coercive
field (Hc) of 75 Oe was obtained when the current density J, was equal 5 mA/cm2 and it had a maximum
saturation magnetization mS of 0.43 emu/g. For thickness modification, the Hc decreased with increasing
thickness, however, followed by a decrease in saturation magnetization mS. Finally, a series of the
growth parameters to J = 5 mA/cm2 was optimum parameters for obtaining the flat core Ni-Fe thin films

as needed flux gate sensor in this experiment.