Title :
Magnetic and hysteretic properties of Fe-filled nanotubes
Author :
Prados, C. ; Crespo, P. ; González, J.M. ; Hernando, A. ; Marco, J.F. ; Gancedo, R. ; Grobert, N. ; Terrones, M. ; Walton, R.M. ; Kroto, H.W.
Author_Institution :
Inst. de Magnetismo Aplicado, Madrid, Spain
fDate :
7/1/2001 12:00:00 AM
Abstract :
The hysteretic properties of Fe-filled carbon nanotubes samples are presented and related to their magnetic phase distribution obtained by Mossbauer spectroscopy. The most relevant result corresponds to the observation of a high anisotropy γ-Fe phase getting magnetically ordered at 100 K. Below this temperature, irreversibility in the high field zero field cooling (ZFC)-field cooling (FC) curves, as well as shifted hysteresis loops are observed. These results are explained in terms of the blocking of the high anisotropy phase and the development of exchange anisotropy
Keywords :
Mossbauer effect; carbon nanotubes; exchange interactions (electron); iron; magnetic anisotropy; magnetic hysteresis; magnetic particles; C:Fe; Fe-filled nanotubes; Mossbauer spectroscopy; exchange anisotropy; high anisotropy γ-Fe phase; high field zero field cooling; hysteretic properties; irreversibility; magnetic phase distribution; shifted hysteresis loops; Anisotropic magnetoresistance; Carbon nanotubes; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetic hysteresis; Magnetic properties; Nanowires; Perpendicular magnetic anisotropy; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
