Linear-response theory applied to the dynamics of submicronic magnetic particles

Physical Review B - Condensed Matter and Materials Physics

Volumn 53, Issue 10, 1996, Pages 6536-6542

  Wegrowe, J ^a   Wernsdorfer, W ^a  

^a CNRS   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0012699151     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.53.6536     Document Type: Article

References (13)

1. N. G. Van Kampen, Adv. Chem. Phys. 34, 245 (1976).
2. W. Wernsdorfer, K. Hasselbach, A. Sulpice, A. Benoit, J-E. Wegrowe, L. Thomas, B. Barbara and D. Mailly, Phys. Rev. B 53, 3341 (1996).
3. R. Street and J. C. Wooley, Proc. Phys. Soc. London Ser. A 62, 562 (1949).
4. E. C. Stoner and E. P. Wohlfarth, Philos. Trans. R. Soc. London Ser. A 240, 599 (1948).
5. K. Matsuo, K. Lindenberg and K. E. Shuler, J. Stat. Phys. 19, 65 (1978).
6. M. Abramowitz and I. A. Stegun, Handbook of Mathematical Functions (Dover, New York, 1972), p. 229.
7. Equations (5) and (14) are not in contradiction since 〈(Formula presented)〉 in (5) is defined in the framework of the linear-response approximation. A demonstration of the Arrhenius law (14) using projection operator formalism can be found in W. Weidlich and H. Grabert, Z. Phys. B 36, 283 (1980), and it can be shown that the linear approximation of the stochastic equation obtained by this last formalism is equivalent to the Mori equation from which Eq. (5) is derived (see Ref. 5).
8. J-E. Wegrowe, R. Ballou, B. Barbara, V. Amaral, A. Sulpice and D. Mailly, Phys. Rev. B 52, 3466 (1995).
9. W. Wernsdorfer, K. Hasselbach, D. Mailly, B. Barbara, A. Benoit, L. Thomas and S. Suran, J. Magn. Magn. Mater. 145, 33 (1995).
10. See, e.g., the Symposium of the Pittsburgh MMM Conference on Macroscopic Quantum Tunneling [J. Appl. Phys. 73, 6697 (1993)], and references therein.
11. M. Stamp, E. Chudnovsky and B. Barbara, Int. J. Mod. Phys. B 6, 1355 (1992)
12. E. G. Harris, Phys. Rev. A 49, 629 (1994), and references therein.
13. P. Politi, A. Rettori, F. Hartmann-Boutron and J. Villain, Phys. Rev. Lett. 75, 537 (1995).