Pressure-Induced Reentrant Oblique Antiferromagnetic Phase in Spin Dimer System TlCuCl_3

Abstract

Magnetization measurements under a hydrostatic pressure of P = 1.4 GPa were performed on the coupled spin dimer system TlCuCl_3, which exhibits a pressure-induced quantum phase transition from a gapped singlet state to an antiferromagnetic state at P_c = 0.042 GPa. Antiferromagnetic ordering with ordered moments parallel to the ac plane was observed at T_N = 16.7 K at 1.4 GPa. The spin reorientation phase transition was observed at T_R ~ 9.2 K for zero magnetic field, at which the ordered moments start to incline towards the b axis. With increasing external field parallel to th b axis, a second-order phase transition from the oblique antiferromagnetic (OAF) phase to the spin-flop (SF) phase occurs below T_R. We argue that the OAF phase arises from the competition between the anisotropic energies of the conventional second order and the fourth order, that increases with increasing pressure. We discuss the OAF-SF transition within the framework of the mean field approximation.

7 pages, 7 figures

References in corpus (26)

• Bose-Einstein Condensation in Magnetic Insulators
• Realization of Bose-Einstein condensation of dilute magnons in TlCuCl${}_3$
• Quantum magnetism and criticality
• Coupled Ladders in a Magnetic Field
• Magnetic Field-Induced Condensation of Triplons in Han Purple Pigment BaCuSi${}_2$O${}_6$
• Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
• Field- and pressure-induced magnetic quantum phase transitions in TlCuCl_3
• Bose-Einstein Condensation of S = 1 Ni spin degrees of freedom in NiCl2-4SC(NH2)2
• Magnon Dispersion in the Field-Induced Magnetically Ordered Phase of TlCuCl3
• Observation of Field-Induced Transverse Néel Ordering in the Spin Gap System TlCuCl${}_3$
• Field-Induced Magnetic Ordering in the Quantum Spin System KCuCl${}_3$
• Spin-resonance modes of the spin-gap magnet TlCuCl_3
• Magnetic-Field Induced Bose-Einstein Condensation of Magnons and Critical Behavior in Interacting Spin Dimer System TlCuCl${}_3$
• Bose-Einstein Condensation of Magnons in TlCuCl3: Phase diagram and specific heat from a self-consistent Hartee-Fock calculation with a realistic dispersion relation
• Impurity-Induced Antiferromagnetic Ordering in the Spin Gap System TlCuCl_3
• Neutron Diffraction Study of the Pressure-Induced Magnetic Ordering in the Spin Gap System TlCuCl${}_3$
• Quantum Phase Transitions in Coupled Dimer Compounds
• Field-driven phase transitions in a quasi-two-dimensional quantum antiferromagnet
• Dynamics of anisotropic spin dimer system in strong magnetic field
• Pressure-Induced Magnetic Quantum Phase Transitions from Gapped Ground State in TlCuCl3
• Pressure-Induced Successive Magnetic Phase Transitions in the Spin Gap System TlCuCl${}_3$
• Quantum Critical Point of the XY Model and Condensation of Field-Induced Quasiparticles in Dimer Compounds
• Pressure-Induced Magnetic Quantum Phase Transition in Gapped Spin System KCuCl3
• Field-induced magnetic ordering in the Haldane system PbNi2V2O8
• Three-Dimensional Ordering in Weakly Coupled Antiferromagnetic Ladders and Chains
• Softening of Magnetic Excitations Leading to Pressure-Induced Quantum Phase Transition in Gapped Spin System KCuCl${}_3$

Cited by in corpus (4)

• Width of the longitudinal magnon in the vicinity of the O(3) quantum critical point
• Magnetic-field- and pressure-induced quantum phase transition in CsFeCl${}_3$ proved via magnetization measurement
• First ESR Detection of Higgs Amplitude Mode and Analysis with Extended Spin-Wave Theory in Dimer System KCuCl${}_3$
• Pressure-induced new magnetic phase in Tl(Cu${}_{0.985}$Mg${}_{0.015}$)Cl${}_3$ probed by muon spin rotation