GIANT MAGNETORESONANCE EFFECT OF NiFe/Ag/ NiFe MULTILAYERS PREPARED WITH DC SPUTTERING TECHNIQUE ON Ag DEPOSITION TIME
Abstract: A study on the Giant
Magnetoresonance (GMR) effect of NiFe/Ag/NiFe multilayers on Ag deposition time (tAg) ranging from 1 to 3
minutes has been performed. The study was intended to obtain the most suitable Ag deposition
time to give the largest GMR ratio by using 150 G deposition field in
transverse direction of anode-chathde and C substrate temperature during
deposition. Several characterizations have been performed including morphological sample cross
section, microstructure, magnetic
properties of the layer, and GMR ratio in an external magnetic field ranging from -20 up to 20 gauss. The results
show that multilayers with tag = 2 minutes displays the largest GMR ratio of
54.87%. The layer has a high level of atomic structure ordering, a large grain
size, the highest remanence and the smallest coercive power. The situation is
close to Pool’s estimation that the GMR ratio for trilayers of approximately
50%.
Penulis: Mohammad Toifur,
Kamsul Abraha, Ridwan
Kode Jurnal: jpfisikadd090079
