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首页> 外文期刊>Journal of magnetism and magnetic materials >Direct and indirect measurements of the magnetic and magnetocaloric properties of Ni_(0.895)Cr_(0.105)MnGe_(1.05) melt-spun ribbons in high magnetic fields
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Direct and indirect measurements of the magnetic and magnetocaloric properties of Ni_(0.895)Cr_(0.105)MnGe_(1.05) melt-spun ribbons in high magnetic fields

机译：直接和间接测量Ni_（0.895）CR_（0.105）MnGe_（1.05）Mnge_（1.05）熔化带中的磁性和磁热性能的直接和间接测量

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摘要

We report the magnetic and magnetocaloric properties of rapidly solidified Ni(0.895)Cr(0.105)MnGe(1.05 )melt-spun ribbons studied by both direct (adiabatic temperature change) and indirect (isothermal magnetic entropy change) methods in intermediate and high magnetic fields up to 10 T. The maximum values of the adiabatic temperature changes (Delta T-ad) and magnetic entropy changes (vertical bar Delta S-M vertical bar) were found to be similar to 2.6 K (mu H-o = 10 T) and 4.4 J kg(-1) K-1 (mu(o)Delta H = 5 T), respectively, near the Curie temperature (T-C). The Delta T-ad curves and magnetization isotherms were found to be completely reversible, which indicates the high degree of reversibility of the MCEs in this system. A large temperature span (of about 61 K) and a non-saturating behavior of Delta T-ad were observed at magnetic fields up to 10 T. The adiabatic temperature change was found to be a linear function of (mu H-o)(2/3) near T-C, in accordance with the Landau theory of phase transitions.
机译：我们报告了通过直接（绝热温度变化）和中间和高磁场中的直接（绝热温度变化）和间接（等温磁熵变化）方法研究的快速固化的Ni（0.895）Cr（0.105）Mnge（1.05）MELT-SPUN丝带的磁性和磁热性能最多10吨。发现绝热温度变化（Delta T-Ad）和磁熵变化（垂直条三角形SM垂直杆）的最大值类似于2.6k（mu ho = 10 t）和4.4 j kg （-1）k-1（mu（o）δh= 5t），靠近居里温度（tc）。发现ΔT-AD曲线和磁化等温线被发现完全可逆，这表明该系统中MCE的高度可逆性。在高达10T的磁场下观察到ΔT-AD的大的温度跨度（约61 k）和非饱和行为。发现绝热变化是（MU HO）的线性函数（2 / 3）在TC附近，按照阶段转型的Landau理论。

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