Small-angle neutron scattering and magnetization study of HoNi2B2C
M. Ramazanoglu1,2, M. Laver3, A. Yagmurcu4, E.-M. Choi5, S.-I. Lee5, A. Knigavko6, and B.D. Gaulin1,7
1Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada 2Faculty of Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
3Department of Metallurgy and Materials, University of BirminghamEdgbaston, Birmingham B15 2TT, United Kingdom
4Ministery of Development, Ankara 06100, Turkey
5National Creative Research Initiative Center for Superconductivity and Department of Physics, Pohang Universityof Science and Technology, Pohang 790-784, Republic of Korea
6Department of Physics, Brock University, St. Catharines, Ontario L2S 3A1, Canada
7Canadian Institute for Advanced Research, 180 Dundas St. W., Toronto, Ontario M5G 1Z8, Canada
Received August 6, 2013
The superconducting and magnetic properties of HoNi2B2C single crystals are investigated through transport, magnetometry and small-angle neutron scattering (SANS) 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 behavior of SANS appears consistent with the metamagnetic transitions reported in earlier works.
PACS: 72.10.Di Scattering by phonons, magnons, and other nonlocalized excitations; PACS: 72.15.Eb Electrical and thermal conduction in crystalline metals and alloys; PACS: 72.15.Jf Thermoelectric and thermomagnetic effects; PACS: 74.25.–q Properties of type I and type II superconductors; PACS: 75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.).