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The coercivity mechanism of Sm2Co17-type magnet has been studied for a long time, it is generally acceptaed that domain wall pinning by the SmCo5 cell boundary phase is the origin of large coercivity of this kind of magnet. Several works pointed out that Cu distribution around the cell boundary phase is the reason for domain wall pinning [1][2]. However, there still exists argument in whether the...
High-dispersed unltra-small ferromagnetic nanoparticles show great potential in nano-device and magnetic hyperthermia [1-4]. Nd2Fe14B magnets are considered as the highest magnetic energy product ever discovered and have attracted much interest in various applications. To overcome the main drawback of conventional physical route, novel chemical synthesis for Nd2Fe14B oriented magnets have received...
The core of the current granular perpendicular magnetic recording (PMR) media is the granular oxide magnetic layer (GOML). We observe that a fcc NiW seed layer, followed by a hcp Ru layer sputtered under low pressure (LP-Ru) and then by a hcp Ru layer sputtered under high pressure (HP-Ru) provides an excellent structural template for the granular oxide magnetic layer (GOML). Microstructure and magnetic...
In this paper, the microstructure and magnetic properties of the Fe3B/(Pr,Tb)2Fe14B nanocomposite permanent magnets obtained from melt-spun powders with composition of Pr4.2Tb0.3Fe78B17.5 by applying spark plasma sintering (SPS) was discussed. Since the magnetic properties such as remanence (Br) and coercivity (Hci) will deteriorate dramatically due to excessive grain growth during sintering process...
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