TY  - JOUR
T1  - Study the Anomaly in the Magnetic Properties of Invar Alloys by using
X-ray Diffraction and Mossbauer Spectra
AU - Khalefa, N.A. AU - Abid Al-Shaabani, Yousif 
JO  - Journal of Engineering and Applied Sciences
VL  - 12
IS  - 24
SP  - 7599
EP  - 7603
PY  - 2017
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2017.7599.7603
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2017.7599.7603
KW  - Mossbauer spectra
KW  -XRD
KW  -super paramagnetic
KW  -anomaly
KW  -Invar alloy
KW  -occurrence
AB  - In this research, Fe<SUB>100-x</SUB>
 Ni<SUB>x</sub> nanoparticle alloys with x = 29, 32 and 37 is studied. X-ray diffraction patterns were obtained at room temperature confirmed the coexistence of both b.c.c and f.c.c phases
for x = 29 and 32. However only f.c.c phase was observed for x = 37 Mossbauer Spectroscopy (MS) shows an
anomaly in the occurrence of a paramagnetic structure characteristic of the low-spin (anti taenite) f.c.c phases,
in addition to the magnetic materials characteristic of the b.c.c phase and the high-spin f.c.c phase obtained at
high-spin f.c.c phase observed in XRD patterns. MS technique proves was an effective instrument for studying
and prepared nanoparticle system. The anomaly in the nanoparticle magnetic alloys is due to competing
ferromagnetic and antiferromagnetic interactions which arise as a result of fluctuations in the interatomic
spacing.
ER  -