Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}

Schröder C, Prozorov R, Kögerler P, Vannette MD, Fang X, Luban M, Matsuo A, Kindo K, Müller A, Todea AM (2008)
Physical Review B 77(22): 224409.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Schröder, ChristianUniBi ; Prozorov, Ruslan; Kögerler, Paul; Vannette, Matthew D.; Fang, Xikui; Luban, Marshall; Matsuo, Akira; Kindo, Koichi; Müller, AchimUniBi ; Todea, Ana MariaUniBi
Abstract / Bemerkung
Our measurements of the differential susceptibility partial derivative M/partial derivative H of the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30} reveal a pronounced dependence on magnetic field (H) and temperature (T) in the low H-low T regime, contrary to the predictions of the existing models. Excellent agreement with experiment is achieved upon formulating a nearest-neighbor classical Heisenberg model where the 60 nearest-neighbor exchange interactions in each molecule, rather than being identical as has been assumed heretofore, are described by a two-parameter rectangular probability distribution of values of the exchange constant. We suggest that the probability distribution provides a convenient phenomenological platform for summarizing the combined effects of multiple microscopic mechanisms that disrupt the idealized picture of a Heisenberg model based on a single value of the nearest-neighbor exchange constant.
Erscheinungsjahr
2008
Zeitschriftentitel
Physical Review B
Band
77
Ausgabe
22
Art.-Nr.
224409
ISSN
1098-0121
eISSN
1550-235X
Page URI
https://pub.uni-bielefeld.de/record/1587102

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Schröder C, Prozorov R, Kögerler P, et al. Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}. Physical Review B. 2008;77(22): 224409.
Schröder, C., Prozorov, R., Kögerler, P., Vannette, M. D., Fang, X., Luban, M., Matsuo, A., et al. (2008). Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}. Physical Review B, 77(22), 224409. doi:10.1103/PhysRevB.77.224409
Schröder, C., Prozorov, R., Kögerler, P., Vannette, M. D., Fang, X., Luban, M., Matsuo, A., Kindo, K., Müller, A., and Todea, A. M. (2008). Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}. Physical Review B 77:224409.
Schröder, C., et al., 2008. Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}. Physical Review B, 77(22): 224409.
C. Schröder, et al., “Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}”, Physical Review B, vol. 77, 2008, : 224409.
Schröder, C., Prozorov, R., Kögerler, P., Vannette, M.D., Fang, X., Luban, M., Matsuo, A., Kindo, K., Müller, A., Todea, A.M.: Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}. Physical Review B. 77, : 224409 (2008).
Schröder, Christian, Prozorov, Ruslan, Kögerler, Paul, Vannette, Matthew D., Fang, Xikui, Luban, Marshall, Matsuo, Akira, Kindo, Koichi, Müller, Achim, and Todea, Ana Maria. “Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}”. Physical Review B 77.22 (2008): 224409.

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