Gyromagnetic remanence acquired by greigite (Fe3S4) during static three-axis alternating field demagnetization

Gyromagnetic remanence acquired by greigite (Fe3S4) during static threeaxis alternating field demagnetization

S. Hu,1,2 E. Appel,1 V. Hoffmann,1 W. W. Schmahl3 and S. Wang2 1 Institut für Geologie und Paläontologie, Universität T übingen, Sigwartstrasse 10, 72076 T übingen, Germany. E-mail: [email protected] 2Nanjing Institute of Geography and L iminology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, P.R. China 3 Institut für Mineralogie, Petrologie und Geochemie, Unive...

Low-temperature magnetic properties of greigite (Fe3S4)

[1] We provide comprehensive low-temperature magnetic results for greigite (Fe3S4) across the spectrum from superparamagnetic (SP) to multidomain (MD) behavior. It is well known that greigite has no lowtemperature magnetic transitions, but we also document that it has strong domain-state dependence of magnetic properties at low temperatures. Blocking of SP grains and increasing thermal stabilit...

Structure, Morphology and Growth of Biogenic Greigite (Fe3S4)

Magnetic structure of greigite (Fe3S4) probed by neutron powder diffraction and polarized neutron diffraction

[1] We have investigated greigite (Fe3S4) using a combination of neutron powder diffraction and polarized neutron diffraction to give the first unambiguous assignment of its magnetic structure. Our results confirm that greigite has a collinear ferrimagnetic structure with antiferromagnetic coupling between the tetrahedral (A) and octahedral (B) sites. Our analysis also indicates that greigite d...

Influence of demagnetization in remanence curves of magnetic thin films

Remanent magnetization curves of perpendicular magnetic thin films are simulated and measured. The simulations are used to investigate the theoretical influence of the strong demagnetizing field present in these films. Conclusions are drawn from this on how remanence curves should be measured and how they should be c0rrecte.d for the demagnetizing influence. The experimental part consists of me...