Rock magnetic and micromagnetic modeling data for New Flow samples from Juan de Fuca Ridge

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.