Pressure-Induced Reentrant Oblique Antiferromagnetic Phase in Spin Dimer System TlCuCl 3 - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




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Abstract: Magnetization measurements under a hydrostatic pressure of P = 1.4 GPa wereperformed on the coupled spin dimer system TlCuCl 3, which exhibits apressure-induced quantum phase transition from a gapped singlet state to anantiferromagnetic state at P c = 0.042 GPa. Antiferromagnetic ordering withordered moments parallel to the ac plane was observed at T N = 16.7 K at 1.4GPa. The spin reorientation phase transition was observed at T R ~ 9.2 K forzero magnetic field, at which the ordered moments start to incline towards theb axis. With increasing external field parallel to th b axis, a second-orderphase transition from the oblique antiferromagnetic OAF phase to thespin-flop SF phase occurs below T R. We argue that the OAF phase arises fromthe competition between the anisotropic energies of the conventional secondorder and the fourth order, that increases with increasing pressure. We discussthe OAF-SF transition within the framework of the mean field approximation.



Author: Fumiko Yamada, Yasuyuki Ishii, Takao Suzuki, Teiichiro Matsuzaki, Hidekazu Tanaka

Source: https://arxiv.org/







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