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Updated: May 8, 2025

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Temperature-Dependent Magnetic Resonance Relaxation Behaviors in Porous Materials
Peiyuan Yan1, Mohammad Sadegh Zamiri1, Florea Marica1
1University of New Brunswick, UNB MRI Centre, Department of Physics, Fredericton, New Brunswick, E3B 5A3, Canada.
Abstract:
We observe divergent temperature-dependent magnetic resonance relaxation behaviors across various brine-saturated porous materials. The paramagnetic and diamagnetic nature of the samples underlies these divergent behaviors. The temperature-dependent trends of the longitudinal T_{1} and transverse T_{2} relaxation times are systematically explained via distinct relaxation-diffusion regimes of Brownstein-Tarr theory. Water diffusivity is a key determinant of the behavior. While systematic temperature-dependent relaxation trends were observed with the majority of the samples, a minority showed temperature independence. This was attributed to the transition of relaxation behaviors between distinct relaxation-diffusion regimes. The temperature dependence observed reinforces the notion that Brownstein-Tarr theory describes the full gamut of relaxation behaviors in fluid saturated porous media.
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