Magnetic fluctuations in individual superparamagnetic particles

IEEE Transactions on Magnetics

Volumn 50, Issue 11, 2014, Pages

  Piotrowski, Stephan K ^a   Matty, Michael F ^a   Majetich, Sara A ^a  

^a CARNEGIE MELLON UNIVERSITY   (United States)

Author keywords

Conductive AFM (C AFM); magnetite; magnetoresistance; nanoparticle

Indexed keywords

ATOMIC FORCE MICROSCOPY; MAGNETIC MOMENTS; MAGNETITE; MAGNETITE NANOPARTICLES; MAGNETORESISTANCE; NANOPARTICLES; SUPERPARAMAGNETISM;

AFM; CONDUCTIVE ATOMIC FORCE MICROSCOPY; EFFECT OF MAGNETIC FIELD; EFFECTIVE ANISOTROPY; INDIVIDUAL PARTICLES; MAGNETIC FLUCTUATION; SUPERPARAMAGNETIC NANOPARTICLES; SUPERPARAMAGNETIC PARTICLES;

NANOMAGNETICS;

EID: 84916242037     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2014.2321327     Document Type: Article

References (23)

1. C. Black, C. Murray, R. Sandstrom, and S. Sun, "Spin-dependent tunneling in self-assembled cobalt-nanocrystal superlattices," Science, vol. 290, pp. 1131-1134, Nov. 2000.
2. N. Taub, A. Tsukernik, and G. Markovich, "Inter-particle spin-polarized tunneling in arrays of magnetite nanocrystals," J. Magn. Magn. Mater., vol. 321, no. 13, pp. 1933-1938, Jul. 2009.
3. M. Jamet et al., "Magnetic anisotropy of a single cobalt nanocluster," Phys. Rev. Lett., vol. 86, pp. 4676-4679, May 2001.
4. A. Kubetzka et al., "Revealing antiferromagnetic order of the Fe monolayer on W(001): Spin-polarized scanning tunneling microscopy and first-principles calculations," Phys. Rev. Lett., vol. 94, no. 8, p. 087204, Mar. 2005.
5. D. Djayaprawira et al., "230% room-temperature magnetoresistance in CoFeB/MgO/CoFeB magnetic tunnel junctions," Appl. Phys. Lett., vol. 86, no. 9, p. 092502, Feb. 2005.
6. S. Parkin et al., "Giant tunnelling magnetoresistance at room temperature with MgO (100) tunnel barriers," Nature Mater., vol. 3, pp. 862-867, Dec. 2004.
7. E. Tirosh, B. Tsukerman, N. Taub, S. Majetich, and G. Markovich, "Magnetoresistive telegraph noise in Langmuir-Blodgett films of colloidal magnetite nanocrystals as seen via scanning tunneling microscopy," Phys. Rev. B., vol. 80, no. 22, p. 224427, Dec. 2009.
8. W. Yu, J. Falkner, C. Yavuz, and V. Colvin, "Synthesis of monodisperse iron oxide nanocrystals by thermal decomposition of iron carboxylate salts," Chem. Commun., no. 20, pp. 2306-2307, Oct. 2004.
9. D. Farrell, S. Majetich, and J. Wilcoxon, "Preparation and characterization of monodisperse Fe nanoparticles," J. Phys. Chem. B, vol. 107, no. 40, pp. 11022-11030, Oct. 2003.
10. S. Aharoni and M. Litt, "Superparamagnetism and exchange anisotropy in microparticles of magnetite embedded in an inert carbonaceous matrix," J. Appl. Phys., vol. 42, no. 1, pp. 352-356, Jan. 1971.
11. S. Granz and M. Kryder, "Granular L10 FePt (001) thin films for heat assisted magnetic recording," J. Magn. Magn. Mater., vol. 324, no. 3, pp. 287-294, Feb. 2012.
12. C. Hogg, S. Majetich, and J. Bain, "Investigating pattern transfer in the small-gap regime using electron-beam stabilized nanoparticle array etch masks," IEEE Trans. Magn., vol. 46, no. 6, pp. 2307-2310, Jun. 2010.
13. T. Wen, R. Booth, and S. Majetich, "Ten-nanometer dense hole arrays generated by nanoparticle lithography," Nano Lett., vol. 12, no. 11, pp. 5873-5878, Nov. 2012.
14. E. R. Evarts, L. Cao, D. S. Ricketts, N. D. Rizzo, J. A. Bain, and S. A. Majetich, "Spin transfer torque switching of magnetic tunnel junctions using a conductive atomic force microscope," Appl. Phys. Lett., vol. 95, no. 13, p. 132510, Sep. 2009.
15. V. K. Lazaron and L. Lari, private communication, 2014.
16. F. Voogt, T. Fujii, P. Smulders, L. Niesen, M. James, and T. Hibma, "NO2-assisted molecular-beam epitaxy of Fe3O4, Fe3 -delta O4, and gamma-Fe2O3 thin films on MgO(100)," Phys. Rev. B, vol. 60, pp. 11193-11206, Oct. 1999.
17. D. Gilks et al., "Origin of anomalous magnetite properties in crystallographic matched heterostructures: Fe3O4(111)/MgAl2O4(111)," J. Phys., Condensed Matter, vol. 25, no. 48, p. 485004, Dec. 2013.
18. J. M. Coey, Magnetism and Magnetic Materials. Cambridge, U.K.: Cambridge Univ. Press, 2010, p. 242.
19. M. Julliere, "Tunneling between ferromagnetic films," Phys. Lett. A, vol. 54, no. 3, pp. 225-226, 1975.
20. A. Yanase and K. Siratori, "Band structure in the high temperature phase of Fe3O4," J. Phys. Soc. Jpn., vol. 53, no. 1, pp. 312-317, 1984.
21. Z. Zhang and S. Satpathy, "Electron states, magnetism, and the Verwey transition in magnetite," Phys. Rev. B., vol. 44, pp. 13319-13331, Dec. 1991.
22. T. Seki, S. Mitani, K. Yakushiji, and K. Takanashi, "Spinpolarized current-induced magnetization reversal in perpendicularly magnetized L10-FePt layers," Appl. Phys. Lett., vol. 88, no. 17, pp. 172504-1-172504-3 Apr. 2006.
23. J. Slonczewski, "Conductance and exchange coupling of 2 ferromagnets separated by a tunneling barrier," Phys. Rev. B, vol. 39, pp. 6995-7002, Apr. 1989.