Frank Donald Stacey (21 August 1929, Essex, UK) is an English-born Australian geophysicist, known for his research on rock magnetism[1] and application of thermodynamics to understanding the Earth's core and mantle.
From 1961 to 1964 he was a Royal Society Gassiot Fellow in Geomagnetism at the Meteorological Office Research Unit of the University of Cambridge.
In the theory of remanence for igneous rocks, Stacey introduced the concept of pseudo-single domain for magnetic grains which are small and multi-domained.
[1][11] He did research on scientifically describing rock fabric using magnetic anisotropy[1][12] and predicting earthquakes and volcanic eruptions using piezomagnetism.
[15][16][17][18][19][20] Using a lattice dynamical formulation for the Grüneisen parameter, he developed a new equation of state for high pressures with applications to materials in the Earth's core and lower mantle.