The low-temperature heat capacity of antiferromagnetic ternary iron silicides M/sub 2/Fe/sub 3/Si/sub 5/ (M=Sm, Gd-Yb) has been measured from 0.5 to 30K. Antiferromagnetic ordering temperatures range from 1.06 to 10K for these materials including multiple magnetic transitions in Sm/sub 2/Fe/sub 3/Si/sub 5/, Tb/sub 2/Fe/sub 3/Si/sub 5/, and Er/sub 2/Fe/sub 3/Si/sub 5/. Magnetic ordering via the Ruderman-Kittel-Kasuya-Yosida interactions is indicated, even in the presence of large crystalline electric field effects. Entropy considerations indicate the magnetic ground state is a doublet in all of these materials except Gd/sub 2/Fe/sub 3/Si/sub 5/. Anomalous behaviour is observed with respect to spin-wave and nuclear contributions to the total heat capacity, crystalline electric field effects, and critical behavior. (14 References).
BT - Phys. Rev. B DA - 1983/// DO - 10.1103/PhysRevB.28.2732 IS - 5 LA - eng N2 -The low-temperature heat capacity of antiferromagnetic ternary iron silicides M/sub 2/Fe/sub 3/Si/sub 5/ (M=Sm, Gd-Yb) has been measured from 0.5 to 30K. Antiferromagnetic ordering temperatures range from 1.06 to 10K for these materials including multiple magnetic transitions in Sm/sub 2/Fe/sub 3/Si/sub 5/, Tb/sub 2/Fe/sub 3/Si/sub 5/, and Er/sub 2/Fe/sub 3/Si/sub 5/. Magnetic ordering via the Ruderman-Kittel-Kasuya-Yosida interactions is indicated, even in the presence of large crystalline electric field effects. Entropy considerations indicate the magnetic ground state is a doublet in all of these materials except Gd/sub 2/Fe/sub 3/Si/sub 5/. Anomalous behaviour is observed with respect to spin-wave and nuclear contributions to the total heat capacity, crystalline electric field effects, and critical behavior. (14 References).
PY - 1983 EP - 42 EP - 2732+ T2 - Phys. Rev. B TI - Low-temperature heat capacity of antiferromagnetic ternary rare-earth iron silicides M2Fe3Si5 UR - http://cvining.com/system/files/articles/vining/vining-PRB-1983b.pdf VL - 28 ER -