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- W1630830712 abstract "The effect of randomness on field-induced magnetic ordering was investigated through specific heat measurements in Tl$_{1-x}$K$_x$CuCl$_3$ with $xleq 0.22$. The isostructural parent compounds TlCuCl$_3$ and KCuCl$_3$ are coupled spin dimer systems with a gapped ground state and their field-induced antiferromagnetic ordering is described by the Bose condensation of spin triplets (triplons). Well-defined field-induced phase transitions were observed in Tl$_{1-x}$K$_x$CuCl$_3$. The critical exponent $phi$ of the phase boundary defined by $T(H) propto (H-H_{rm c})^{1/phi}$ is reevaluated in TlCuCl$_3$ as $phi=1.67 pm 0.07$, which is close to $phi_{rm BEC} =3/2$ derived from the triplon BEC theory. For $x neq 0$, the exponent $phi$ decreases systematically with $x$. The phase boundary observed at low temperatures for $x>0.1$ is almost a linear function of temperature $T$. In the low-field region for $H<H_{rm c}$, no magnetic ordering is observed in spite of finite susceptibility. These properties are discussed in connection with the Bose glass phase argued by Fisher {it et al.} [Phys. Rev. B {bf 40}, 546 (1989)]." @default.
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- W1630830712 date "2003-10-29" @default.
- W1630830712 modified "2023-09-27" @default.
- W1630830712 title "Triplon Localization Effect in Tl_{1-x}$K_xCuCl_3" @default.
- W1630830712 hasPublicationYear "2003" @default.
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