Antiferromagnetic ordering in the doped Kondo insulator CeRhSb

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.14100· OSTI ID:509032

Menon, L; Malik, S K ^[1]

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1. Tata Institute of Fundamental Research, Colaba, Bombay 400 005 (India)

CeRhSb, the so-called {open_quotes}Kondo insulator,{close_quotes} is a mixed-valent compound showing a gap formation in the electronic density of states. On the other hand, CePdSb is ferromagnetically ordered with a Curie temperature of {approximately}17 K. We have carried out magnetic susceptibility and electrical resistivity measurements on CeRh{sub 1{minus}x}Pd{sub x}Sb (0{le}x{le}1.0), to study the ground-state properties of this system. For small Pd doping in CeRhSb, up to 20{percent}, the gap continually diminishes and no magnetic ordering is observed down to 2 K. In the region 0.3{le}x{le}0.4, as soon as the gap is suppressed, an antiferromagnetic ground state is observed. In the region 0.5{le}x{lt}0.7, the compounds are not single phase. At the CePdSb end, in the region 0.7{le}x{le}1, the ground state is ferromagnetic. The observation of an antiferromagnetic phase in the phase diagram of CeRh{sub 1{minus}x}Pd{sub x}Sb, where neither end is antiferromagnetic, is interesting and is discussed in the light of some recent theoretical models. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 509032
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 55; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
ANTIMONY ALLOYS
ANTIMONY COMPOUNDS
CERIUM ALLOYS
CERIUM COMPOUNDS
CURIE POINT
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
ENERGY GAP
FERROMAGNETIC MATERIALS
INTERMETALLIC COMPOUNDS
KONDO EFFECT
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
PALLADIUM COMPOUNDS
PHASE DIAGRAMS
RHODIUM ALLOYS
RHODIUM COMPOUNDS
TEMPERATURE DEPENDENCE