In the paper, a sensor is designed based on a photonic crystal wherein the magnetic fluid is infiltrated in the aslant cavity which is introduced in the crystal. The proposed structure consists of dielectric rods whose radius is 200nm. Magnetic field sensing can be realized by observing the shift in resonant wavelength. It is been observed that at a wavelength of 1618 nm the sensitivity is found to be 10 nm/Oe and a quality factor of 7960. It is also important to note that the magnetic field sensitivity increases due to the dominance of the electromagnetic resonance in the aslant cavity. The increase in the infiltrated air holes increases the magnetic field sensitivity. The structure gives a maximum sensitivity of 17.37nm/Oe and a quality factor of 8290. the azimuthal Poynting vector is continuous. With the help of the PWE method, the photonic bandgap is determined and Opti FDTD is used for the simulation.

Magnetic Fluid (MF), Magnetic Field Sensitivity, Photonic Crystal, Q-Factor.