A method for measuring rapid magnetization change in high field using a pulse magnetizer: A new rock magnetic approach

Kazuto KODAMA

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-EM Earth's Electromagnetism

[S-EM37_30AM2] Geomagnetism, paleomagnetism and rock magnetism

Wed. Apr 30, 2014 11:00 AM - 12:45 PM 413 (4F)

Convener:*Ataru Sakuraba(Department of Earth and Planetary Science, University of Tokyo), Nobutatsu Mochizuki(Priority Organization for Innovation and Excellence, Kumamoto University), Chair:Nobutatsu Mochizuki(Priority Organization for Innovation and Excellence, Kumamoto University), Futoshi Takahashi(Faculty of Sciences, Kyushu University)

11:00 AM - 11:15 AM

[SEM37-07] A method for measuring rapid magnetization change in high field using a pulse magnetizer: A new rock magnetic approach

*Kazuto KODAMA¹ (1.Center for Advanced Marine Core Research, Kochi University)

Keywords:rock magnetism, pulse magnetic field, magnetic hysteresis

Pulse magnetizers have frequently been used in rock magnetic studies for the convenience of the production of high magnetic field without the need for a large electromagnet, enabling the rapid acquisition of isothermal remanent magnetization (IRM) for short (c. 10^-2 sec) period of time. Because the demand for high field is limited as much as 10 T for rock magnetism, the pulse magnetizer can be compact and low-cost, and several commercial systems are available for the purpose of imparting IRM. We propose in this study a new method for measuring the dynamical behavior of magnetization in pulsed high-field, a new cost-effective system comprised of a fast broad-bandwidth digital oscilloscope and a newly designed coil system. We show examples of such dynamical behaviors from a set of natural samples, and discuss these results in comparison with conventional rock magnetic analyses.