Cooperative versus superparamagnetic behavior of dense magnetic nanoparticles in Co80Fe20/Al2O3 multilayers

Applied Physics Letters

Volumn 82, Issue 23, 2003, Pages 4116-4118

  Sahoo, S ^a   Petracic, O ^a   Kleemann, W ^a   Stappert, S ^a   Dumpich, G ^a   Nordblad, P ^b   Cardoso, S ^c   Freitas, P P ^c  

^a UNIVERSITY OF DUISBURG ESSEN   (Germany)

^b UPPSALA UNIVERSITY   (Sweden)

^c INESC   (Portugal)

Author keywords

[No Author keywords available]

Indexed keywords

COBALT COMPOUNDS; FREEZING; MAGNETIZATION; NANOSTRUCTURED MATERIALS; RELAXATION PROCESSES; SPIN GLASS; SUPERPARAMAGNETISM;

STOP-AND-WAIT MAGNETIZATION;

MULTILAYERS;

EID: 0037828790     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.1581002     Document Type: Article

References (22)

1. G. A. Prinz and J. H. Hathaway, Phys. Today 48, 24 (1995); P. Grünberg, ibid. 54, 31 (2001); G. A. Prinz, Science (Washington, DC, U.S.) 282, 1660 (1998).
2. G. A. Prinz and J. H. Hathaway, Phys. Today 48, 24 (1995); P. Grünberg, ibid. 54, 31 (2001); G. A. Prinz, Science (Washington, DC, U.S.) 282, 1660 (1998).
3. G. A. Prinz and J. H. Hathaway, Phys. Today 48, 24 (1995); P. Grünberg, ibid. 54, 31 (2001); G. A. Prinz, Science (Washington, DC, U.S.) 282, 1660 (1998).
4. J. L. Dormann, D. Fiorani, and E. Tronc, Adv. Chem. Phys. 98, 283 (1997).
5. F. J. Himpsel, J. E. Ortega, G. J. Mankey, and R. F. Willis, Adv. Phys. 47, 511 (1998).
6. S. X. Wang and A. M. Taratorin, Magnetic Information Storage Technology (Academic, New York, 1999).
7. S. Sun, C. B. Murray, D. Weller, L. Folks, and A. Moser, Science (Washington, DC, U.S.) 287, 17 (2000).
8. J.-L. Maurice, J. Briático, J. Carrey, F. Petroff, L. F. Schelp, and A. Vaurès, Philos. Mag. A 97, 2921 (1999).
9. S. Morup and E. Tronc, Phys. Rev. Lett. 72, 3278 (1994).
10. M. Ulrich, J. Garcia-Otero, J. Rivas, and A. Bunde, Phys. Rev. B 67, 024416 (2003).
11. M. Porto, Eur. Phys. 26, 229 (2001).
12. V. N. Kondratyev and H. O. Lutz, Phys. Rev. Lett. 81, 4508 (1998).
13. W. Kleemann, O. Petracic, C. Binek, G. N. Kakazei, Y. G. Pogorelov, J. B. Sousa, S. Cardoso, and P. P. Freitas, Phys. Rev. B 63, 134423 (2001).
14. C. Morawe and H. Zabel, J. Appl. Phys. 77, 1969 (1995).
15. W. H. Meiklejohn and C. P. Bean, Phys. Rev. 105, 904 (1956).
16. L. Néel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949); W. F. Brown, Jr., Phys. Rev. 130, 1677 (1963).
17. L. Néel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949); W. F. Brown, Jr., Phys. Rev. 130, 1677 (1963).
18. J. A. Mydosh, Spin Glasses: An Experimental Introduction (Taylor and Francis, London, 1993).
19. M. F. Hansen, P. E. Jönsson, P. Nordblad, and P. Svedlindh, J. Phys.: Condens. Matter 14, 4901 (2002).
20. S. Sahoo, O. Petracic, C. Binek, W. Kleemann, J. B. Sousa, S. Cardoso, and P. P. Freitas, Phys. Rev. B 65, 134406 (2002).
21. K. Jonason, E. Vincent, J. Hammann, J.-P. Bouchaud, and P. Nordblad, Phys. Rev. Lett. 81, 3243 (1998).
22. X. Chen, O. Sichelschmidt, W. Kleemann, O. Petracic, C. Binek, J. B. Sousa, S. Cardoso, and P. P. Freitas, Phys. Rev. Lett. 89, 137203 (2002).