论文标题
铁磁性CO $ _ {1.75} $ fe $ _ {1.25} $ o $ $ _4 $及其与batio $ _3 $的复合物的磁力曲线的温度和磁场依赖性的非平衡自旋动力学
Non-equilibrium spin dynamics in the temperature and magnetic field dependence of magnetization curves of ferrimagnetic Co$_{1.75}$Fe$_{1.25}$O$_4$ and its composite with BaTiO$_3$
论文作者
论文摘要
对非平衡磁性现象（磁阻断，内存，交换偏差和老化效应）的比较研究已针对铁磁性CO $ _ {1.75} $ _ {1.75} $ _ {1.25} $ o $ $ $ _4 $（CFO）及其具有非磁性Batio Batio $ $ $ $ _3 $ _3 $（BTO）的复杂性。同步加速器X射线衍射模式已证实复合材料中CFO和BTO结构的共存，但是磁性自旋动力学已得到了显着修改。在与磁场开关的磁场和时间相关的磁化强度合作的情况下，通过不同模式（零场冷却和场冷却）磁性测量的不同模式（零场冷却和场冷却）磁性测量的模式（零场冷却和场冷却）磁性测量的阻塞现象已经研究了。在时间依赖磁化测量磁化曲线的不同阶段，在时间依赖磁化测量过程中的非常规方案的应用对于揭示磁性自旋顺序的非平衡动力学非常有用。施加场外松弛实验已成为可能调整系统的磁态和矫正性的可能性。通过比较Co $ _ {1.75} $ _ {1.75} $ _ {1.25} $ _ {1.25} $ _4 $ _4 $ spinel Oxide和其与Batio $ _____________的合成的实验结果，通过比较Co $ _ {1.75} $ _ {1.75} $ _ {1.75} $ _ {1.75} $ _ {1.75}的实验结果，了解磁性和非磁性颗粒之间的界面耦合的作用已被理解在不同的磁性现象（元稳定的磁状态，交换偏置和记忆效应）上。
A comparative study of the non-equilibrium magnetic phenomena (magnetic blocking, memory, exchange bias and aging effect) has been presented for ferrimagnetic Co$_{1.75}$Fe$_{1.25}$O$_4$ (CFO) and its composite with non-magnetic BaTiO$_3$ (BTO). Synchrotron X-Ray diffraction patterns have confirmed coexistence of CFO and BTO structures in composite, but magnetic spin dynamics have been remarkably modified. The blocking phenomenon of ferrimagnetic domains below the room temperature has been studied by different modes of (zero field cooled and field cooled) magnetic measurements in collaboration with magnetic fields ON and OFF modes and time dependent magnetization. The applications of unconventional protocols during time dependent magnetization measurement at different stages of the temperature and field dependence of the magnetization curves have been useful to reveal the non-equilibrium dynamics of magnetic spin order. The applying of off-field relaxation experiments has made possible to tune the magnetic state and coercivity of the systems. The role of interfacial coupling between magnetic and non-magnetic particles has been understood on different magnetic phenomena (meta-stable magnetic state, exchange bias and memory effect) by comparing the experimental results of Co$_{1.75}$Fe$_{1.25}$O$_4$ spinel oxide and its composite with BaTiO$_3$ particles.
