Paramagnetic resonance of Gd/sup 3 +/ as a probe of exchange and crystal-field effects in rare-earth-metal pnictides: Antiferromagnetic and diluted materials

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.4955· OSTI ID:5369360

Sugawara, K; Huang, C Y; Cooper, B R

We have extended the previous study of electron paramagnetic resonance (EPR) of dilute Gd/sup 3 +/ impurities in Van Vleck paramagnets to study related antiferromagnetic compounds. The host systems studied are the terbium monopnictides and the cerium monopnictides. We have studied both pure host systems and systems with the host rare-earth metal diluted with yttrium. Since the Gd/sup 3 +/ EPR linewidths are often substantial compared to the resonance field, we have included the antiresonance (negative-frequency) effect in the analysis. The Gd/sup 3 +/ resonance g factor serves to probe the host susceptibility. Of particular interest in this regard is the g-factor behavior for TbP as the host system. This agrees quite closely with the superconducting quantum interference device magnetometer susceptibility behavior (i.e., in extremely small magnetic field) found by Koetzler et al., showing that the EPR g factor obtained indeed measures the linear response of the host system. This effect should be useful for studying systems such as CeSb where the apparent susceptibility, as conventionally measured, is likely to include substantial nonlinear contributions. The linewidth behavior is complex. Fluctuation effects among host crystal-field levels sometimes dominate, and this allows the host crystal-field splitting to be determined.

• Research Organization: Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106
• OSTI ID: 5369360
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANTIFERROMAGNETIC MATERIALS
CERIUM COMPOUNDS
CHARGED PARTICLES
CRYSTAL FIELD
ELECTRON SPIN RESONANCE
GADOLINIUM IONS
IMPURITIES
IONS
LANDE FACTOR
LINE WIDTHS
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIC RESONANCE
MAGNETIC SUSCEPTIBILITY
MATERIALS
PHYSICAL PROPERTIES
PNICTIDES
RARE EARTH COMPOUNDS
RESONANCE
TERBIUM COMPOUNDS
VAN VLECK THEORY