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Magnetic hysteresis in young mid‐ocean ridge basalts: Dominant cubic anisotropy?
Author(s) -
Gee Jeff,
Kent Dennis V.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl00263
Subject(s) - remanence , anisotropy , single domain , geology , saturation (graph theory) , condensed matter physics , magnetic hysteresis , stoner–wohlfarth model , hysteresis , magnetic anisotropy , basalt , grain size , ridge , mineralogy , materials science , magnetization , magnetic field , physics , seismology , paleontology , geomorphology , optics , mathematics , quantum mechanics , combinatorics
Magnetic hysteresis data from young mid‐ocean ridge basalts include samples with saturation remanence to saturation magnetization (Mrs/Ms) ratios greater than 0.5, the theoretical limit for an assemblage of single domain grains with uniaxial anisotropy. Under the usual assumption of dominant uniaxial anisotropy, the narrow single domain grain size distribution implied by these high Mrs/Ms values is difficult to reconcile with petrographic and remanence data that suggest the presence of larger multidomain grains. Dominant cubic anisotropy provides a plausible explanation for the high Mrs/Ms ratios, and if generally valid, requires reinterpretation of granulometric and domain state inferences made from hysteresis data.