Strong enhancement of magnetic coercivity induced by uniaxial stress

Autor:	Shen, Bin, Breitner, Franziska, Gegenwart, Philipp, Jesche, Anton
Rok vydání:	2024
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.133.186702
Popis:	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. Comment: Main text: 7 pages, 3 figures. Supplemental material: 3 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2404.19320 Zobrazit plný text záznamu View this record from Arxiv