期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 125, 期 10, 页码 5927-5936出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.1c00355
关键词
-
资金
- Swedish Energy Agency [465611]
- Swedish Research Council (VR)
- VR [2017-05030]
- Swedish Research Council [2017-05030] Funding Source: Swedish Research Council
Magnetic nanocomposites based on ferrite were synthesized using a sol-gel approach, showing potential for exchange-coupled bimagnetic behavior. By studying the distribution of hard/soft particles, interface optimization, and magnetic response through XRPD, TEM, and magnetic measurements, the study established the potential of hard/soft SFO/CFO nanostructures in current permanent magnet technology.
Magnetic nanocomposites (NCs) are extremely appealing for a wide range of energy-related technological applications, specifically as building blocks for next-generation permanent magnets. The design of such nanostructures requires precise chemical synthesis methods, which will permit the fine-tuning of the magnetic properties. Here we present an in-depth structural, morphological and magnetic characterization of ferrite-based nanostructures obtained through a bottom-up sol-gel approach. The combination of the high coercivity of a hard phase SrFe12O19 (SFO) and the high saturation magnetization of a soft phase, CoFe2O4 (CFO), allowed us to develop exchange-coupled bimagnetic NCs. A symbiotic effect is observed in a SFO/CFO nanocomposite, as the unique oriented growth of SFO prevents grain growth of the CFO, thus restricting the crystallite size of both. Through X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and magnetic measurements we clarify the relationship between the distribution and size of hard/soft particles, the optimization of interfaces and the obtained uniform magnetic response. This study allowed us to establish the potentiality of hard/soft SFO/CFO nanostructures in current permanent magnet technology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据