论文标题
Mn位置掺杂及其对反铁磁Mn $ _5 $ si $ _3 $合金的倒置滞后和热磁不可逆性行为的影响
Mn-site doping and its effect on inverted hysteresis and thermomagnetic irreversibility behavior of antiferromagnetic Mn$_5$Si$_3$ alloy
论文作者
论文摘要
名义成分的Mn座掺杂金属间锰合金Mn $ _ {5-X} $ _x $ _x $ si $ _3 $（$ x $ = 0.05、0.1、0.2，0.1、0.2和a = ni，cr）的结构和磁性行为已被重点调查，以重点进行了重点。室温X射线粉末衍射数据确认所有掺杂的合金都在六角形$ d8_8 $类型结构中结晶，带有空间$ p6_3/mcm $。发现掺杂的合金在从室温下冷却过程中显示出顺磁性（PM） - 共线性抗铁磁性（AFM2） - 非共线性抗铁磁（AFM1）过渡。随着Ni/Cr浓度的增加，已经观察到AFM1-AFM2过渡温度和场的临界值显着降低。倒置磁滞回路，野外诱导的逮捕和热磁性逮捕，未凝聚的Mn $ _5 $ _5 $ si $ _3 $合金的关键特征被发现受到MN位点掺杂的显着影响，并最终以4 \％的掺杂消失了。
The structural and magnetic behavior of Mn-site doped intermetallic manganese silicide alloys of nominal compositions Mn$_{5-x}$A$_x$Si$_3$ ($x$ = 0.05, 0.1, 0.2 and A = Ni, Cr) have been investigated with a focus to the inverted hysteresis behavior and thermomagnetic irreversibility. Room temperature x-ray powder diffraction data confirm that all the doped alloys crystallize in hexagonal $D8_8$ type structure with space group $P6_3/mcm$. The doped alloys are found to show paramagnetic (PM) - collinear antiferromagnetic (AFM2) - noncollinear antiferromagnetic (AFM1) transitions during cooling from room temperature. A significant decrease in the critical values of both AFM1-AFM2 transition temperatures and fields have been observed with the increasing Ni/Cr concentration. Inverted hysteresis loop, field-induced arrest, and thermomagnetic arrest, the key features of the undoped Mn$_5$Si$_3$ alloy, are found to be significantly affected by the Mn-site doping and eventually vanishes with 4\% doping.
