Rock magnetic and micromagnetic modeling data for New Flow samples from Juan de Fuca Ridge
Creators: name: Han, Fei
name: Wang, Huapei
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 370607
subject: Magnetism and palaeomagnetism

description: This zip file contains data presented in the submission “Internal stress enhances the stability of oceanic crust’s remanent magnetization” by Han et al., 2024.1. Folder “MicroMag” contains two subfolders and a MATLAB script.(1) Subfolder "MicroMag_Models" contains the MERRILL scripts and Patran geometries to reproduce the results.(2) Subfolder "MicroMag_Results" contains csv files to reproduce the results in Fig 4. Each File name contains composition, grain size and stress magnitude.The header format of each csv file is:# - The model index numberSx - The x-component of the unit vector describing the stress axisSy - The y-component of the unit vector describing the stress axisSz - The z-component of the unit vector describing the stress axis(Am^2) - The x-component of the net magnetic moment(Am^2) - The y-component of the net magnetic moment(Am^2) - The z-component of the net magnetic momentMs (A/m) - The saturation magnetizationVolume (m^3) - The volume of the modelled particle(3) Shrinkage_Model.m is a MATLAB script to reproduce the results in SI appendix Fig. S10.2. Folder “Figure05_DATA” has one Excel spreadsheet that contains all data plotted in Figure 5a–d.3. Folder “Rockmagnetism” contains five subfolders.(1) Subfolder “FORC_DATA” contains the FORC data of NF7 samples. We conducted FORC measurements with a field increment of 1.0 mT and a saturation field of 2.0 T using a Lake Shore vibrating sample magnetometer (VSM 8604) at China University of Geosciences (Wuhan).(2) Subfolder “IRM+DCD_DATA” contains an Excel spreadsheet that shows the isothermal remanent magnetization (IRM) acquisition data and backfield direct-current demagnetization (DCD) data with a saturation field of 2.0 T. These data were obtained using a Lake Shore vibrating sample magnetometer (VSM 8604) at China University of Geosciences (Wuhan).(3) Subfolder “high-saturation hys_DATA” contains the high-saturation-field (14.0 T) hysteresis loop data [applied field (mT), Magnetization (Am2)]. These experiments were conducted using a Quantum Design physical property measurement system (PPMS) at Wuhan National High Magnetic Field Center. Samples were cut into 2.5 mm*2.5 mm*3.0 mm in size using diamond wire with 0.35 mm diameter for the high-saturation-field measurements. The sweep rate was set to 3 mT/sec for applied fields in the [-2 T, 2 T] range, and 5 mT/sec for applied fields in the [-14 T, -2 T] and [2 T, 14 T] range.(4) Subfolder “low-saturation hys_DATA” contains the low-saturation-field (1.0 T and 2.0 T) hysteresis loop data [applied field (mT), Magnetization (Am2)] obtained using a Lake Shore vibrating sample magnetometer (VSM 8604) at China University of Geosciences (Wuhan).(5) Subfolder “low-temperature TFT_DATA” contains the low-temperature backfield direct-current demagnetization (DCD) data of NF7a1a and NF7b2a for thermal fluctuation tomography (TFT) modeling. We conducted these measurements using a Princeton Measurements Corporation vibrating sample magnetometer equipped with a low-temperature cryostat (LT-VSM) at the Institute for Rock Magnetism at the University of Minnesota. We measured backfield demagnetization curves at logarithmic increments from 2 mT to 1200 mT from 10 K to 300 K at 10 K.