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Critical behavior of the metallic triangular-lattice Heisenberg antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>PdCrO</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
We report physical properties of the conductive magnet ${\text{PdCrO}}_{2}$ consisting of a layered structure with a triangular lattice of ${\text{Cr}}^{3+}$ ions $(S=3/2)$. We confirmed an antiferromagnetic transition at ${T}_{\text{N}}=37.5\text{ }\text{K}$ by means of specific heat, electrical resistivity, magnetic susceptibility, and neutron-scattering measurements. The critical behavior in the specific heat persists …