Title :
Magnetic properties of Ti0.9957Fe0.01O2
Author :
Kim, E.C. ; Moon, S.H. ; Woo, S.I. ; Kim, H.D. ; Kim, B.Y. ; Lee, S.H. ; Cho, J.H. ; Joh, Y.G. ; Kim, D.H.
Author_Institution :
Dept. of Phys., Yeungnam Univ., Gyeongsan, South Korea
Abstract :
Mossbauer spectra, X-ray diffraction and magnetic susceptibility measurements on Ti0.9957Fe0.01O2 are carried out in order to examine the magnetic properties and separated contribution of the ferromagnetic and paramagnetic phases to the magnetization. XRD data show that Ti0.9957Fe0.01O2 has a pure rutile phase with tetragonal structures. Magnetic hysteresis curve at room temperature reveal an obvious ferromagnetic behavior and the magnetic moment per Fe atom under the applied field of 1 T is estimated to be about 0.72μB which suggests a low spin configuration of Fe ions. The coercive field measured results from the magnetic correlation between iron particles instead of that of iron clusters. Mossbauer spectral data obtained consists of a ferromagnetic and a paramagnetic phase from 4 to 300 K. Also, Curie temperature of the system is determined to be 1150 K and the magnetic hyperfine field of the ferromagnetic phase of Ti0.9957Fe0.01O2 is found to be 500 kOe, which is higher than that of α-Fe.
Keywords :
Curie temperature; Mossbauer effect; X-ray diffraction; coercive force; crystal structure; ferromagnetic materials; magnetic hysteresis; magnetic moments; magnetic susceptibility; paramagnetic materials; titanium compounds; 1 T; 1150 K; 4 to 300 K; Curie temperature; Mossbauer spectra; Ti0.99Fe0.01O2; X-ray diffraction; XRD; coercive field; ferromagnetic phase; iron clusters; iron particles; magnetic correlation; magnetic hyperfine field; magnetic hysteresis curve; magnetic moment; magnetic susceptibility; magnetization; paramagnetic phase; pure rutile phase; room temperature; spin configuration; tetragonal structure; Iron; Magnetic properties; Magnetic separation; Magnetic susceptibility; Magnetization; Paramagnetic materials; Phase measurement; Temperature; X-ray diffraction; X-ray scattering;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463567
