Thermal Expansion of Magnetite (4.2 — 300 K)

Yvette Hancock (1) , Trevor Roy Finlayson (2)

1 TKK - TKK Helsinki University of Technology
2 School of Physics [Melbourne]

The thermal expansion of a synthetic single crystal sample of magnetite (Fe₃O₄) in the [111] direction has been investigated for the temperature range of 4.2 — 300 K using three-terminal capacitance dilatometry. The strain results and corresponding thermal expansion curve show the Verwey transition to be first-order with T_v = 120 ± 2 K. At T = 4.2 — 70 K, the sample shows Invar-like behaviour.

Mots clés: Physical Sciences

Yvette Hancock, Trevor Roy Finlayson. Thermal Expansion of Magnetite (4.2 — 300 K). Philosophical Magazine, 2009, 89 (22-24), pp.1913-1921. ⟨10.1080/14786430802647057⟩. ⟨hal-00514007⟩