Strong enhancement of magnetic coercivity induced by uniaxial stress

Abstract

The performance of permanent magnets is intricately tied to their magnetic hysteresis loop. In this study, we investigate the heavy-fermion ferromagnet CeAgSb${}_2$ through magnetization measurements under uniaxial stress. We observe a 2400 % increase in magnetic coercivity with just a modest stress of approximately 1 kbar. This effect persists even after pressure release, attributable to stress-induced defects that efficiently pin domain walls. Other magnetic properties such as ordering temperature and saturation moment exhibit only weak pressure dependencies and display full reversibility. Our findings offer a promising route for increasing coercive field strength and enhancing the energy product in ferromagnetic materials and are potentially applicable to a broad spectrum of commercial or emerging magnetic applications.

Main text: 7 pages, 3 figures. Supplemental material: 3 pages, 4 figures

References in corpus (4)

• Kondo-lattice ferromagnets and their peculiar order along the magnetically hard axis
• Uniaxial stress tuning of geometrical frustration in a Kondo lattice
• Magnetic field-induced softening of spin waves and hard-axis order in Kondo-lattice ferromagnet CeAgSb${}_2$
• Topological Magnetic Hysteresis in Single Crystals of CeAgSb2 Ferromagnet