Low-temperature heat capacity of antiferromagnetic ternary rare-earth iron silicides M/sub 2/Fe/sub 3/Si/sub 5/

Journal Article · Thu Sep 01 00:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.2732· OSTI ID:5487106

Vining, C B; Shelton, R N

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 30 K. Antiferromagnetic ordering temperatures range from 1.06 to 10 K 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 interaction 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 behavior is observed with respect to spin-wave and nuclear contributions to the total heat capacity, crystalline electric field effects, and critical behavior.

• Research Organization: Ames Laboratory and Department of Physics, Iowa State University, Ames, Iowa 50011
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5487106
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 28:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
IRON SILICIDES
MAGNETIC PROPERTIES
SPECIFIC HEAT
SPIN WAVES
RARE EARTH COMPOUNDS
ANTIFERROMAGNETIC MATERIALS
CRYSTAL FIELD
DYSPROSIUM
ENTROPY
ERBIUM
GADOLINIUM
GROUND STATES
HOLMIUM
SAMARIUM
TERBIUM
THULIUM
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
X-RAY DIFFRACTION
YTTERBIUM
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
ENERGY LEVELS
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
METALS
PHYSICAL PROPERTIES
RARE EARTHS
SCATTERING
SILICIDES
SILICON COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360603* - Materials- Properties