运用“等结构合金化”原则和“居里温度窗口”方法,采用双变量方式,结合第一性原理计算,进行了一系列成分验证,最终获得了跨越40K至450K的超宽居里温度窗口。
A series of unprecedentedly wide Curie-temperature windows (CTWs) between 40 and 450 K are realized by employing the isostructural alloying principle for the strongly coupled magnetostructural phase transitions in a single host system.
实验观察到了典型的铁磁马氏体相变及其变磁转变行为,并发现了高达7000 ppm的温度诱发和磁场诱发多晶大应变。与传统Heusler合金相比,d-metal Heusler合金具有巨大的体积变化。
The coherent decreasing trend in martensitic transformation temperature is observed. The magnetostructural martensitic transformation, producing a 5-fold modulated martensite, exhibits a large magneto-strain of 6900 ppm and a large volume discontinuity of −2.54%.
本工作中我们在等结构合金化的原理下,通过降低TCA,同时提高体系的Tt和TCM,建立了一系列覆盖低温、室内和高温的单相MnCoNiGeSi体系的宽居里温度窗。
We have established a series of wide Curie-temperature windows that cover the temperature range from the cryogenic, through the room, and to the high temperatures in single-phase MnCoNiGeSi system.
本研究表明,过渡族d金属不仅有利于B2型Heusler相的形成,也可以建立强的铁磁耦合,从而为调控马氏体相变提供可能。本工作打破了对Heusler合金传统成相规律的认识,拓展了磁相变材料的设计思路和家族成员。
Our present study from the view of d-d hybridization deepens the understanding on the phase formation, martensitic transformation, and magnetic coupling of multifunctional shape-memory ferromagnets.
这一研究工作提出了以居里温度窗口调控相变的新思路,采用单一而有效的等结构合金化方法,同步实现了材料设计的多个目标,获得了具有优异性能的新型铁磁马氏体相变材料。
We have found that a stable PM–FM magnetostructural coupling in a broad temperature window, with tunable magnetoresponsive properties, can be obtained in martensitic phase-transition materials tailored by suitable substitution of Fe in MnNiGe.
这项工作表明,PM/ FM型马氏体具有大量磁化变换。此外,还发现了场诱发马氏体相变和较大的磁热效应。
This work is shown that PM/FM-type martensitic transformations with substantial magnetization changes can be realized . Also, a field-induced martensitic transformation and large magnetocaloric effect are reported.