论文标题
Mn位置掺杂的抗铁磁Mn $ _5 $ SI $ _3 $合金的多功能行为
Multifunctional behavior of Mn-site doped antiferromagnetic Mn$_5$Si$_3$ alloys
论文作者
论文摘要
目前的工作报告了对Ni和Cr掺杂的Mn $ _5 $ _5 $ si $ _3 $合金的磁性和磁性行为的详细调查纯净（未掺杂）和掺杂的合金都表现出相当大的磁磁性（MR）。通过Ni和Cr，在Mn位置的掺杂导致MR值单调降低。另一方面，发现磁联性效应（MCE）很有趣，并且所有合金在磁结构过渡温度周围均显示出常规MCE和逆MCE。在观察到的两种类型的MCE中，发现逆MCE随着掺杂浓度的增加而降低，并且与MR行为一致，而掺杂导致常规MCE值显着增加。
Present work reports a detailed investigation on the magnetoresistance and magnetocaloric behavior of Ni and Cr-doped Mn$_5$Si$_3$ alloys with general formula Mn$_{5-x}$A$_x$Si$_3$ (where A = Ni/Cr; $x$ = 0, 0.05, 0.1 and 0.2). Both pure (undoped) and doped alloys show a reasonably large amount of magnetoresistance (MR). Doping at Mn-site, both by Ni and Cr, results in a monotonic decrease in MR values. Magnetocaloric effect (MCE), on the other hand, is found to be interesting, and all the alloys show both conventional and inverse MCE around the magneto-structural transition temperature. Among the two types of MCE observed, the inverse MCE is found to decrease with increasing doping concentration and consistent with the MR behavior, whereas doping results in a significant increase in conventional MCE values.
