Investigation of the magnetic phase transition in U 3 Al 2 Si 3
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A transition to magnetic ordered state has been investigated by AC-susceptibility measurements on a single crystal of U 3 Al 2 Si 3 at ambient pressure and at high pressure up to p=6.7 kbar. The transition to the magentic ordered state in U 3 Al 2 Si 3 is accompanied with a relatively wide double peak between T=25 K and T=50 K in AC-susceptibility data. A pronounced maximum at about T c1M =37 K and a local maximum at about T c2M =45 K are both shifted to lower temperatures by applied pressure with different pressure coefficients ∂T c1M/∂p=−0.9±0.1 K kbar−1 and ∂T c2M/∂p=−0.5±0.1 K kbar−1, respectively.
PACS75.30.C 75.30.K 62.50.+p
Key wordsmagnetic phase transition high pressure U3Al2Si3
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