The superconducting and magnetic properties of HoNi2B2C single crystals are investigated through transport, magnetometry and small-angle neutron scattering measurements. In the magnetic phases that enter below the superconducting critical temperature, the small-angle neutron scattering data uncover networks of magnetic surfaces. These likely originate from uncompensated moments e.g. at domain walls pinned to crystallographic grain boundaries. The field and temperature dependent behaviour appears consistent with the metamagnetic transitions reported in earlier works.
Optimization of parameters of nanostructure for study inverse proximity effects on "superconductor-ferromagnetic" interface using Polarized Neutron Reflectometry in enhanced standing wave regime
Wing structure in the phase diagram of the Ising Ferromagnet URhGe close to its tricritical point investigated by angle-resolved magnetization measurements
Suppression of magnetic order in CaCo$_{1.86}$As$_{2}$ with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co$_{1-x}$Fe$_{x}$)$_{y}$As$_{2}$
磁化，中子衍射，高能X射线衍射结果的Sn助熔剂生长的单晶样品的Ca（Co $_{1-x}$ Fe $_{x}$）$_{y}$作为$_{2}$，$0\leq x\leq1$，$1.86\leq y \leq 2$，并显示A型反铁磁秩序，与有序的时刻位于沿$c$轴，持续为$x\lesssim0.12(1)$。随着$x$的增加，反铁磁序被平滑地抑制，有序矩和Néel温度都线性降低。$x\leq0.25$不出现条纹型反铁磁序，$x$也不出现铁磁序，至少达到$x=0.104$，并且发生从CaCo $_{1.86}$ As $_{2}$的四重（cT）相到CaFe $_{2}$ As $_{2}$的四重（T）相的平滑交叉。这些结果表明，空穴掺杂CaCo $_{1.86}$ As $_{2}$对磁性和结构的影响不如Sr取代Ca的空间效应显著。
Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFe$_2$As$_2$ by Small-Angle Neutron Scattering Studies of the Vortex Lattice
我们研究了KFe $_2$ As $_2$中超导态的内禀各向异性。当外加磁场向FeAs晶面旋转时，利用小角中子散射对涡旋晶格成像。各向异性被发现是强烈的场依赖性，表明多带超导性。此外，高场各向异性显着超过上临界场，提供进一步的支持泡利限制在KFe $_2$作为$_2$中施加在基面的字段。泡利顺磁性对涡核中未成对准粒子的影响直接从纵向和横向涡旋晶格场调制引起的散射强度的比值中表现出来。
