Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence

Details Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ep%26s...50....9f&link_type=abstract

Earth, Planets and Space, Volume 50, p. 9-14.

Computer Science

11

Scientific paper

Shape of magnetic hysteresis loops of the Chinese loess-paleosol sequence is variable with low-field susceptibility and is weakly constricted in samples with intermediate susceptibility (~1.0 × 10-6 m3/kg). The analyses of the hysteresis loops show that both low- (ferrimagnetic) and high-coercivity (antiferromagnetic) components are present and the ferrimagnetic component dominate the magnetic characteristics. The ratio of ferrimagnetic over antiferromagnetic minerals (S ratio) and the superparamagnetic fraction increase with increasing susceptibility. Neither simple two-component mixtures of ferrimagnetic and antiferromagnetic minerals nor of single-domain and superparamagnetic grains fully explain the constricted hysteresis loops. We interpret the variation of the loop shape with susceptibility in the following way. When the ratio of the ferrimagnetic to antiferromagnetic contribution is relatively low (low susceptibility), the broad loop is controlled by lithogenic ferrimagnetic and antiferromagnetic minerals. For samples with intermediate susceptibility values, constricted shape originates from an addition of a broad loop from the lithogenic fraction and a narrow loop from a pedogenic fraction with high superparamagnetic content. Then with further susceptibility increase, the constricted shape almost disappears and the loop is dominated by the pedogenic fraction. The variation of hysteresis loop shape with susceptibility can be a useful indicator of the degree of pedogenesis for loess-paleosol samples.

Affiliated with

Also associated with

No associations

Rating

Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable shape of magnetic hysteresis loops in the Chinese loess-paleosol sequence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1655151