Exchange-spring behavior in sputter-deposited α-Fe/NdFeB multilayer magnets

Spark Plasma Sintered NdFeB-based Nanocomposite Hard Magnets with Enhanced Magnetic Properties

“…The studies done up to know on Nd-Fe-B nanocomposite bulk magnets (sintered or bonded) used either Fe (Wei et al, 1994;McCormick et al, 1998;Lewis et al, 2001;Rada et al, 2005;Niu et al, 2007;Bhame et al, 2010;Cha et al, 2010) or Fe 2 Co micro or nanopowders (Wei et al, 1994) to increase the remanence and saturation magnetization of the respective PMs, whereas Fe, FeCo and Fe-B have been used in combination with Nd-Fe-B to prepare multilayered structures by deposition methods (Shindo et al, 1996;Cui & O'Shea, 2004;Ao et al, 2005;Kato et al, 2005). Additionally, other attempts to prepare nanocomposite PMs used combinations of Nd-Fe-B and Sm-Co-based particles (Talijan, 2006;Betancourt & Davies, 2010).…”

Synthesis and Characterization of Advanced Magnetic Materials

“…X-ray diffraction and Mössbauer spectroscopy have been used to study the phase structure and substitutions in the nanosized samples . The concentration regions for the existence of the solid-solutions in the α- In a different project we proposed to study the structural and magnetic properties of α-Fe/Nd 2 Fe 14 B magnetic multilayers obtained by pulsed laser deposition (PLD) [35][36][37][38][39][40][41][42][43]. The α-Fe exhibit high magnetic remanence, high coercivity, high energy product and low cost [44][45][46][47][48][49][50][51][52][53][54].…”

First-principles study of interface magnetic structure in Nd2Fe14B/(Fe,Co) exchange spring magnets

“…Exchange spring magnets 1,2 , nanocomposite materials consisting of hard and soft magnetic phases coupled by exchange interaction, have been promising as high-performance magnets 3 , and Nd-Fe-B-based exchange spring magnets are particularly attractive from the viewpoint of low rare-earth metal content. In theoretical studies, (BH) max values of 0.6∼1.0 MJm −3 for Nd-Fe-B-based magnets have been predicted [4][5][6][7] , but such high energy-product values have been difficult to achieve in real materials [8][9][10][11][12][13][14][15][16] . To obtain greater values of (BH) max in real materials, the advanced design of nanostructures is required.…”