Used as a magnetic recording material in audio and video tapes due to its strong magnetic properties. Commonly found in credit and debit card stripes for data storage. Employed in ferrofluids for engineering and medical applications. Acts as a contrast agent in MRI imaging when formulated into nanoparticles. Utilized in catalysts for chemical synthesis and environmental remediation processes. Applied in pigments for coatings, inks, and cosmetics providing yellow to red-brown colors. Investigated for use in lithium-ion battery electrodes to enhance performance.