Effects of the environment on nonadiabatic magnetization process in uniaxial molecular magnets at very low temperatures

Keiji Saitou, Seiji Miyashita, Hans De Raedt

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We discuss the effect of the thermal environment on the low-temperature response of the magnetization of uniaxial magnets to a time-dependent applied magnetic field. At very low temperatures the stepwise magnetization curves observed in molecular magnets such as Mn12 and Fe8 display little temperature dependence where the apparent thermal assisted process are suppressed. We show that the changes of the magnetization at each step cannot be analyzed directly in terms of a quantum-mechanical nonadiabatic transition. In order to explain this nonadiabatic behavior, we study the quantum dynamics of the system weakly coupled to a thermal environment and propose a relation between the observed magnetization steps and the quantum-mechanical transition probability due to the nonadiabatic transition.

Original languageEnglish
Pages (from-to)14553-14556
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number21
Publication statusPublished - 1999
Externally publishedYes

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Magnets
Magnetization
magnets
thermal environments
magnetization
Temperature
transition probabilities
Magnetic fields
temperature dependence
curves
magnetic fields
Hot Temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Effects of the environment on nonadiabatic magnetization process in uniaxial molecular magnets at very low temperatures. / Saitou, Keiji; Miyashita, Seiji; De Raedt, Hans.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 60, No. 21, 1999, p. 14553-14556.

Research output: Contribution to journalArticle

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