Finite-size effects at diamagnetic phase transitions and in the Condon domain 
phase

Gordon, A.; Wyder, P.

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Finite-size effects at diamagnetic phase transitions and in the Condon domain phase

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Gordon, A.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Wyder, P.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Gordon, A., & Wyder, P. (2001). Finite-size effects at diamagnetic phase transitions and in the Condon domain phase. Physical Review B, 64(22): 224427.

Cite as: https://hdl.handle.net/21.11116/0000-000E-E517-6

Abstract

The diamagnetic phase transition in a sample of finite
thickness (thin film) is studied. It is shown that changing the
film thickness is equivalent to shifting the diamagnetic phase-
transition to a lower temperature. Calculations of the effect
of the Condon domain influence on the specific heat temperature
jump at second-order diamagnetic phase transition in a slab are
performed. The contribution from the domain walls and
demagnetization effects to the jump in specific heat at the
phase transition is shown to be independent of the slab
thickness. We calculate the critical sample size for the
diamagnetic phase-transition existence, i.e., the film
thickness, below which the order parameter of the diamagnetic
phase transition is zero. The compressibility increase observed
in beryllium and occurring as a result of the domain formation
is qualitatively explained.