![]() Pt 1-x Ni x (x = 0.25 to 0.92) thin films were examined for possible application as magnetic thermometers. This initial study shows that FiM/AFM interfacial magnetic coupling is a viable method to increase thermosensitivity in MNOs for T-MPI. Magnetic particle spectroscopy (MPS) measurements were performed at room temperature to evaluate the MNOs MPI response. The FiM/AFM exchange coupling is confirmed by field-cooled (FC) hysteresis loops measured at 100 K. ![]() Thermosensitivity is evaluated and quantified by temperature-dependent magnetic measurements. The FiM/AFM MNOs are characterized by X-ray diffraction (XRD), (scanning) transmission electron microscopy (STEM/TEM), dynamic light scattering (DLS), and Raman spectroscopy. We demonstrate that thermosensitivity can be amplified in MNOs consisting of ferrimagnetic (FiM) iron oxide (ferrite) and antiferromagnetic (AFM) cobalt oxide (CoO) through interface effects. For this thermometry technique, magnetic nano-objects (MNOs) with strong temperature-dependent magnetization (thermosensitivity) around the temperature of interest are required here, we focus between 200 K and 310 K. Thermal magnetic particle imaging (T-MPI), a temperature variant of magnetic particle imaging (MPI), hopes to solve this deficiency. ![]() Measurement of temperature within an optically inaccessible three-dimensional (3D) volume at microscale resolution is currently limited. Temperature is a fundamental physical quantity important to the physical and biological sciences. ![]()
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