Pressure-induced ferromagnetism with strong Ising-type anisotropy in YbCu${}_2$Si${}_2$

Abstract

We report dc magnetic measurements on YbCu${}_2$Si${}_2$ at pressures above 10 GPa using a miniature ceramic anvil cell. YbCu${}_2$Si${}_2$ shows a pressure-induced transition from the non-magnetic to a magnetic phase at 8 GPa. We find a spontaneous dc magnetization in the pressure-induced phase above 9.4 GPa. The pressure dependence of the ferromagnetic transition temperature T_C and the spontaneous magnetic moment m_0 at 2.0 K have been determined. The value of m_0 in the present macroscopic measurement is less than half of that determined via Mossbauer experiment. The difference may be attributed to spatial phase separation between the ferromagnetic and paramagnetic phases. This separation suggests that the pressure-induced phase boundary between the paramagnetic and ferromagnetic states is of first order. Further, we have studied the magnetic anisotropy in the pressure-induced ferromagnetic state. The effect of pressure on the magnetization with magnetic field along the magnetic easy $c$-axis is much larger than for field along the hard $a$-axis in the tetragonal structure. The pressure-induced phase has strong Ising-type uniaxial anisotropy, consistent with the two crystal electric field (CEF) models proposed for YbCu${}_2$Si${}_2$.

arXiv comment5 pages, 3 figures

References in corpus (17)

• Superconductivity on the border of weak itinerant ferromagnetism in UCoGe
• Influence of Generic Scale Invariance on Classical and Quantum Phase Transitions
• Quantum Phase Transitions in the Itinerant Ferromagnet ZrZn${}_2$
• Quantum Criticality without Tuning in the Mixed Valence Compound beta-YbAlB4
• Multiple energy scales at a quantum critical point
• Pressure dependence of the magnetization in the ferromagnetic superconductor UGe_2
• Quantum Valence Criticality as Origin of Unconventional Critical Phenomena
• Superconductivity near Itinerant Ferromagnetic Quantum Criticality
• Miniature ceramic-anvil high-pressure cell for magnetic measurements in a commercial superconducting quantum interference device magnetometer
• Ferromagnetism in YbCu2Si2 at high pressure
• Quantum phase transition in the heavy-fermion compound YbIr${}_2$Si${}_2$
• Valence Instability of YbCu${}_2$Si${}_2$ through its quantum critical point
• New Universality Class of Quantum Criticality in Ce- and Yb-based Heavy Fermions
• Improved sensitivity of magnetic measurements under high pressure in miniature ceramic anvil cell for a commercial SQUID magnetometer
• Kondo engineering : from single Kondo impurity to the Kondo lattice
• Magnetic measurements at pressures above 10 GPa in a miniature ceramic anvil cell for a superconducting quantum interference device magnetometer
• Interplay between Charge and Magnetic Ordering in YbPd

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• Ferromagnetic quantum critical point in a locally noncentrosymmetric and nonsymmorphic Kondo metal
• The magnetic ground state properties of non-centrosymmetric CePt${}_3$B${}_{1-x}$Si${}_x$