Extrinsic magnetoresistance in magnetite nanoparticles

Journal of Applied Physics

Volumn 93, Issue 10 3, 2003, Pages 7951-7953

  Liu, Kai ^a   Zhao, L ^a   Klavins, P ^a   Osterloh, Frank E ^a   Hiramatsu, H ^a  

^a UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON TUNNELING; MAGNETIC FIELDS; MAGNETITE; MAGNETIZATION; MAGNETORESISTANCE; STOICHIOMETRY; SYNTHESIS (CHEMICAL); TITRATION; X RAY DIFFRACTION ANALYSIS;

EXTRINSIC MAGNETORESISTANCE;

NANOSTRUCTURED MATERIALS;

EID: 0038317682     PISSN: 00218979     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1556133     Document Type: Conference Paper

References (18)

1. J. M. D. Coey, A. E. Berkowitz, L. Balcells, F. F. Putris, and A. Barry, Phys. Rev. Lett, 80, 3815 (1998).
2. J. M. D. Coey, A. E. Berkowitz, L. Balcells, F. F. Putris, and F. T. Parker, Appl. Phys. Lett. 72, 734 (1998).
3. J. M. D. Coey, J. Appl. Phys. 85, 5576 (1999).
4. For a recent review, see for example, J. I. Martin, J. Nogués, K. Liu, J. L. Vicent, and I. K. Schuller, J. Magn. Magn. Mater. 256, 449 (2003).
5. See for example, K. Liu, K. Nagodawithana, P. C. Searson, and C. L. Chien, Phys. Rev. B 51, 7381 (1995).
6. C. T. Black, C. B. Murray, R. L. Sandstrom, and S. Sun, Science 290, 1131 (2000).
7. K. Liu, J. Nogués, C. Leighton, H. Masuda, K. Nishio, I. V. Roshchin, and I. K. Schuller, Appl. Phys. Lett. 81, 4434 (2002).
8. R. Massart, IEEE Trans. Magn. MAG-17, 1247 (1981).
9. T. Fried, G. Shemer, and G. Markovich, Adv. Mater. 13, 1158 (2001).
10. 3 similarly have a large number of small peaks that do not coincide with the cubic magnetite peak positions.
11. K. Liu, X. W. Wu, K. H. Ahn, T. Sulchek, C. L. Chien, and J. Q. Xiao, Phys. Rev. B 54, 3007 (1996).
12. 4 x-ray density.
13. J. Smit and H. P. J. Wijn, Ferrites (Wiley, New York, 1959).
14. G. Q. Gong, A. Gupta, G. Xiao, W. Qian, and V. P. Dravid, Phys. Rev. B 56, 5096 (1997).
15. B. Raquet, J. M. D. Coey, S. Wirth, and S. Von Molnár, Phys. Rev. B 59, 12435 (1999).
16. A Verwey transition in similarly prepared magnetite nanoparticles was observed at a lower temperature of 96 K, see P. Poddar, T. Fried, and G. Markovich, Phys. Rev. B 65, 172405 (2002).
17. We expect the contact resistance to decrease with increasing particle size and packing density as the corresponding number of conduction paths is reduced.
18. J. Q. Xiao, J. S. Jiang, and C. L. Chien, Phys. Rev. Lett. 68, 3749 (1992).