2017/08/03 by Atsushi Miyake, Yoshiaki Sato, Masashi Tokunaga +2 · 9 citations
Chemistry · Materials Science · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Ferromagnetism #Heavy fermion #Iron-based superconductors research #Isostructural #Magnetic Properties of Alloys #Magnetic field #Magnetic susceptibility #Magnetism #Magnetization #Metamagnetism #Paramagnetism #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.96.085127
published in Physical review. B./Physical review. B 96(8) (American Physical Society) · 7 pages, 6 figures, to be published in Phys. Rev. B
arxiv created 2017/08/03 · openalex publication_date 2017/08/21 · arxiv updated 2017/09/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
To solve the puzzle of metamagnetic phenomena in heavy-fermion systems, we have compared paramagnetic isostructural Ce and Yb systems, CeNi2Ge2 and YbNi2Ge2, both of which are located near a magnetic instability. The most intriguing result is the discovery of a metamagneticlike anomaly for isomorphic Ce and Yb paramagnetic systems from magnetization measurements in a pulsed magnetic field. Similar to other metamagnets, the metamagnetic transition fields for both compounds are well scaled by the temperature T_\ensuremathχmax, at which the magnetic susceptibility shows a maximum. In addition, for CeNi2Ge2, a peak of nonlinear susceptibility \ensuremathχ3 appears at approximately T_\ensuremathχmax/2, as for other heavy-fermion metamagnets. In contrast, YbNi2Ge2 shows only a sign change for \ensuremathχ3 at T_\ensuremathχmax, as observed in itinerant metamagnets located near the ferromagnetic critical point. The metamagnetism of CeNi2Ge2 corresponds to a typical Kondo lattice system, whereas that of YbNi2Ge2 is similar to the nearly ferromagnetic itinerant systems. Other possibilities for the metamagnetic behavior of YbNi2Ge2 are also discussed.