TY - JOUR
T1 - Thermally Reduced Soft Magnetic CuFe Nanoparticles for High-Performance Electrical Devices
AU - Prabhakaran, T.
AU - Mangalaraja, R. V.
AU - Beron, F.
AU - Jimenez, J. A.
AU - Denardin, Juliano C.
AU - Arun, T.
AU - Akbari-Fakhrabadi, Ali
N1 - Publisher Copyright:
© 1965-2012 IEEE.
PY - 2021/2
Y1 - 2021/2
N2 - Developing economically soft magnetic materials for high-performance electrical devices is indispensable. Here, we present the structural and magnetic properties of thermally reduced soft CuFe nanoparticles. The fcc cubic structure of iron-rich Cu37Fe63 and their composition was confirmed by Rietveld refinement. Cu37Fe63 nanoparticles exhibited high saturation magnetization and coercivity of 127 eμg (142 eμg) and 4.3 Oe (31 Oe), respectively, at 300 K (5 K). They showed transitions at ∼ 34 and ∼ 249 K due to the Kondo temperature of CuFe and minor fraction of CuFe2O4, respectively. The exchange coupling between Cu and Fe was not significant, as demonstrated by field-cooled magnetization curves at 5 K. The magnetocaloric effect (MCE) in the range of fields and temperatures was estimated whereas the maximum MCE of -8.71× 10-2 J.kg-1. K-1 was achieved at 222 K. These soft magnetic materials, which exhibited stable high saturation magnetization with less heating effect during magnetization and demagnetization cycles, would be suitable candidates for magnetic applications.
AB - Developing economically soft magnetic materials for high-performance electrical devices is indispensable. Here, we present the structural and magnetic properties of thermally reduced soft CuFe nanoparticles. The fcc cubic structure of iron-rich Cu37Fe63 and their composition was confirmed by Rietveld refinement. Cu37Fe63 nanoparticles exhibited high saturation magnetization and coercivity of 127 eμg (142 eμg) and 4.3 Oe (31 Oe), respectively, at 300 K (5 K). They showed transitions at ∼ 34 and ∼ 249 K due to the Kondo temperature of CuFe and minor fraction of CuFe2O4, respectively. The exchange coupling between Cu and Fe was not significant, as demonstrated by field-cooled magnetization curves at 5 K. The magnetocaloric effect (MCE) in the range of fields and temperatures was estimated whereas the maximum MCE of -8.71× 10-2 J.kg-1. K-1 was achieved at 222 K. These soft magnetic materials, which exhibited stable high saturation magnetization with less heating effect during magnetization and demagnetization cycles, would be suitable candidates for magnetic applications.
KW - CuFe alloys
KW - exchange-coupling effect
KW - high saturation magnetization
KW - magnetocaloric effect
KW - soft magnetic materials
KW - thermal reduction
UR - http://www.scopus.com/inward/record.url?scp=85097363527&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2020.3042130
DO - 10.1109/TMAG.2020.3042130
M3 - Article
AN - SCOPUS:85097363527
SN - 0018-9464
VL - 57
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 2
M1 - 9277593
ER -