The rare earth magnetic order in pure and doped Ho_(1−x)Er _x Ni₂B₂C (x=0, 0.25, 0.50, 0.75, 1) single crystal samples was investigated using magnetization and neutron diffraction measurements. Superconducting quaternary borocarbides, RNi₂B₂C where R=Ho, Er , are magnetic intermetallic superconductors with the transition temperatures ∼10 K in which long range magnetic order develops in the same temperature range and competes with superconductivity. Depending on the rare earth composition the coupling between superconductivity and magnetism creates several phases, ranging from a near reentrant superconductor with a mixture of commensurate and incommensurate antiferromagnetism to an incommensurate antiferromagnetic spin modulation with a weak ferromagnetic component. All of these phases coexist with superconductivity. RKKY magnetic interactions are used to describe the magnetic orders in the pure compounds. However, the doping of Er on Ho sites which have two strong magnetic moments with two different easy directions creates new and complicated magnetic modulations with possible local disorder effects. One fascinating effect is the development of an induced magnetic state resembling the pure and doped R ₂CuO₄ cuprate with R=Nd and Pr.

使用磁化和中子衍射测量研究了纯和掺杂 Ho _{(1− x )} Er _x Ni ₂ B ₂ C (x=0, 0.25, 0.50, 0.75, 1) 单晶样品中的稀土磁序。超导四元硼碳化物，R Ni ₂ B ₂ C，其中R = Ho，Er，是磁性金属间超导体，其转变温度~10 K，其中长程磁序在相同温度范围内发展并与超导性竞争。根据稀土成分，超导性和磁性之间的耦合会产生几个阶段，从具有相称和不相称反铁磁性混合物的近重入超导体到具有弱铁磁成分的不相称反铁磁自旋调制。所有这些相都与超导性共存。RKKY 磁相互作用用于描述纯化合物中的磁序。然而，在具有两个不同易方向的两个强磁矩的Ho位点上掺杂Er会产生新的、复杂的磁调制，并可能产生局部无序效应。一种令人着迷的效应是产生类似于纯R ₂ CuO ₄铜酸盐和 R=Nd 和 Pr 的掺杂 R 2 CuO 4 铜酸盐的感应磁态。