Pressure suppresses Mn antiferromagnetic order in CeMnSi at ~1.3 GPa, induces a new anomaly at ~97 K, and the compound exhibits negative thermal expansion below ~40 K at ambient pressure consistent with a heavy-fermion ground state.
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Pressure Effects on CeMnSi: Evolution of Ce 4f and Mn 3d Electronic States and Negative Thermal Expansion
Pressure suppresses Mn antiferromagnetic order in CeMnSi at ~1.3 GPa, induces a new anomaly at ~97 K, and the compound exhibits negative thermal expansion below ~40 K at ambient pressure consistent with a heavy-fermion ground state.