We have performed extensive small-angle neutron scattering (SANS) diffraction studies of the vortex lattice in single crystal YNi2B2C for $B||c$. High-resolution SANS, combined with a ???eld-oscillation vortex lattice preparation technique, allows us to separate Bragg scattered intensities from two orthogonal domains and accurately determine the unit cell angle, e???. The data suggest that upon increasing ???eld there is a ???nite transition width where both low- and high-???eld distorted hexagonal vortex lattice phases, mutually rotated by 45?°, coexist. The smooth variation of diffracted intensity from each phase through the transition corresponds to a redistribution of populations between the two types of domains.
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机译：我们已经对单晶YNi 2 B 2 C中$ B || c $的旋涡晶格进行了广泛的小角中子散射（SANS）衍射研究。高分辨率SANS与场振荡涡流晶格制备技术相结合，使我们能够从两个正交域中分离出布拉格散射强度，并精确地确定晶胞角e。数据表明，随着屈服强度的增加，存在一个有限的过渡宽度，低和高屈服畸变的六角形涡流晶格相共存，相互旋转了45°。从每个相到过渡相的衍射强度的平滑变化对应于两种类型域之间的种群重新分布。
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