Magnetic state in URu₂Si₂, UPd₂Al₃, and UNi₂Al₃ probed by point contacts

• Published in: Физика низких температур
• Date: 2001
• Main Authors: Naidyuk, Yu. G., Kvitnitskaya, O. E., Jansen, A. G. M., Wyder, P., Geibel, C., Menovsky, A. A.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2001
• Subjects: Электpонные свойства металлов и сплавов
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/128684
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Magnetic state in URu₂Si₂, UPd₂Al₃, and UNi₂Al₃ probed by point contacts / Yu. G. Naidyuk, O.E. Kvitnitskaya, A.G. M. Jansen, P.Wyder, C.Geibel, A.A. Menovsky // Физика низких температур. — 2001. — Т. 27, № 6. — С. 668-673. — Бібліогр.: 20 назв. — англ.

The antiferromagnetic (AFM) state has been investigated in the three heavy-fermion compounds URu₂Si₂,UPd₂Al₃, and UNi₂Al₃ by measuring dV/dI(V) curves of point contacts at different temperatures 1.5-20 K and magnetic fields 0-28 T. The zero-bias maximum in dV/dI(V) for URu₂Si₂ points to a partially gapped Fermi surface related to the itinerant nature of the AFM state, contrary to the case of UPd₂Al₃, where analogous features have not been found. The AFM state in UNi₂Al₃ has more similarities with URu₂Si₂. For URu₂Si₂, the same critical field of about 40 T along the easy axis c is found for all features in dV/dI(V), corresponding to the Néel temperature, the gap in the electronic density of states, and presumably the ordered moments. The antiferromagnetic (AFM) state is investigated in the three heavy-fermion compounds URu₂Si₂, UPd₂Al₃, and UNi₂Al₃ by measuring dV/dI(V) curves of point contacts at different temperatures 1.5–20 K and magnetic fields 0–28 T. The zero-bias maximum in dV/dI(V) for URu₂Si₂ points to a partially gapped Fermi surface related to the itinerant nature of the AFM state, contrary to the case of UPd₂Al₃, where analogous features have not been found. The AFM state in UNi₂Al₃ has more similarities with URu₂Si₂. For URu₂Si₂, the same critical field of about 40 T along the easy axis c is found for all features in dV/dI(V), corresponding to the Néel temperature, the gap in the electronic density of states, and presumably the ordered