Magnetic avalanches of minor fast-relaxing species of Mn12 acetate

Physical Review B - Condensed Matter and Materials Physics

Volumn 80, Issue 2, 2009, Pages

  McHugh, S ^a   Jaafar, R ^a   Sarachik, M P ^a   Myasoedov, Y ^b   Finkler, A ^b   Zeldov, E ^b   Bagai, R ^c   Christou, G ^c  

^a CITY COLLEGE OF NEW YORK   (United States)

^b WEIZMANN INSTITUTE OF SCIENCE   (Israel)

^c University of Florida   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 68949133344     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.024403     Document Type: Article

References (33)

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28. The noise at low temperatures is exaggerated by two factors: a nonlinearity in the thermometer that limits the resolution for temperatures below 0.4 K; and noise associated with digitizing (continuous) data acquired by the oscilloscopes.
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30. Notable exceptions are singular systems in which Poiseuille flow of phonons has been found, for example, in liquid helium in a very narrow temperature range at low temperatures (see Ref.).
31. The curve shown in the inset to Fig. 2 hints at two separate temperature steps during the avalanche of the major species. This may signal the occurrence of a minor species avalanche due to incomplete alignment during the magnetic preparation process. Alternatively, it may indicate that the thermal response is more complicated than the expected step function rise followed by an exponential decay to the temperature of the bath.
32. We did not obtain a reliable determination of the separate avalanche speeds at low magnetic fields. This is an interesting area for future study.
33. The minor species magnetization, Mz minor, also contributes to Bz; however, it is neglected since Mminor Mmajor.