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Torikachvili, M. S.; Chen, J. W.; Dalichaouch, Y.; Guertin, R. P.; McElfresh, M.; Rossel, C.; Maple, M. B.; Meisner, G. P.

doi:10.1103/physrevb.36.8660

Cited by 202 publications

(97 citation statements)

References 12 publications

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“…As seen in the inset, the ρ(T ) curve shows a broad minimum near 20 K, followed by a logarithmical increase, which is attributed to the Kondo effect. This behavior is similar to that of NdFe 4 P 12 [1,2,3], which is quite unusual for FM materials. Upon cooling, ρ(T ) exhibits a sharp drop at ∼ 1.15 K, which is associated with the onset of magnetic ordering.…”

Section: Methodssupporting

confidence: 63%

NMR study of filled skutterudite NdOs₄P₁₂

Magishi¹,

Nagata²,

Iwahashi³

et al. 2010

J. Phys.: Conf. Ser.

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Section: Methodssupporting

confidence: 63%

NMR study of filled skutterudite NdOs₄P₁₂

Magishi¹,

Nagata²,

Iwahashi³

et al. 2010

J. Phys.: Conf. Ser.

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“…A negative magnetoresistance is also observed in these compounds in the vicinity of their respective ordering temperatures (21). At 5 T, the magnitude of the magnetization of both PrFe 4 P 12 and PrOs 4 As 12 below their transition temperatures is much less than the Pr 3ϩ free-ion value of 3.2 B ͞Pr ion; however, there is a clear step-like feature in the M(H) data for PrFe 4 P 12 , indicating a metamagnetic transition (19), whereas features in the M(H) data for PrOs 4 As 12 are much more subtle. In high fields, the C(T)͞T data for both systems display a broad dome-shaped anomaly at low temperatures, but in zero field there is no indication of a second-phase transition in the C(T)͞T data for PrFe 4 P 12 (6).…”

Section: Discussionmentioning

confidence: 95%

“…Numerous compounds exhibit features similar to those observed in PrOs 4 As 12 . The most noteworthy example is PrFe 4 P 12 , which, like PrOs 4 As 12 , is a Pr-based filled skutterudite compound that displays heavy fermion behavior and AFM-like features (19,20). The electrical resistivities of these two compounds display a Kondo-like minimum and a sharp downturn below their respective ordering temperatures.…”

Section: Discussionmentioning

confidence: 99%

Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs₄As₁₂

Maple

Butch

Frederick

et al. 2006

Proc. Natl. Acad. Sci. U.S.A.

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Electrical resistivity, specific heat, and magnetization measurements to temperatures as low as 80 mK and magnetic fields up to 16 T were made on the filled skutterudite compound PrOs4As12. The measurements reveal the presence of two ordered phases at temperatures below approximately 2.3 K and in fields below approximately 3 T. Neutron-scattering experiments in zero field establish an antiferromagnetic ground state <2.28 K. In the antiferromagnetically ordered state, the electronic-specific heat coefficient ␥ Ϸ 1 J͞mol⅐K 2 below 1.6 K and 0 < H < 1.25 T. The temperature and magnetic-field dependence of the electrical resistivity and specific heat in the paramagnetic state are consistent with single-ion Kondo behavior with a low Kondo temperature on the order of 1 K. The electronic-specific heat in the paramagnetic state can be described by the resonance-level model with a large zero-temperature electronic-specific heat coefficient that decreases with increasing magnetic field from approximately 1 J͞mol⅐K 2 at 3 T to approximately 0.2 J͞mol⅐K 2 at 16 T.heavy fermion ͉ Kondo effect ͉ antiferromagnetism T he compound PrOs 4 As 12 belongs to the family of filled skutterudites, which have the formula AT 4 X 12 , where A ϭ alkali metal, alkaline earth, lanthanide, or actinide, T ϭ Fe, Os, or Ir, and X ϭ P, As, or Sb. Because the ions reside in an atomic cage with a large number of X nearest neighbors, the hybridization between the lanthanide filler ion localized 4f states and the conduction-electron states is appreciable, often resulting in strongly correlated electron phenomena. In a recent article (1), we reported a study of the physical properties of single crystals of the filled skutterudite compound PrOs 4 As 12 between approximately 0.4 and 300 K by means of magnetization M, specific heat C, and electrical resistivity measurements. The previous study revealed that the compound exhibits two (possibly three) ordered phases below approximately 2.5 K in zero field and approximately 3 T at zero temperature from kinks in M as a function of magnetic field H and temperature T. Features in the (T) and C(T) data in zero field can be identified with transitions into the two ordered phases below 2.5 K. The magnetic susceptibility conforms to a Curie-Weiss law below approximately 20 K with an effective magnetic moment eff ϭ 2.77 B ͞formula unit consistent with a ⌫ 5 ground state in a cubic crystalline electric field and a cusp at approximately 2.5 K, indicative of antiferromagnetic (AFM) order. These results provide another example of the wide range of correlated electron ground states that are found in the Pr-based filled skutterudites, which include conventional (Bardeen, Cooper, Schrieffer) superconductivity (e.g., PrRu 4 Sb 12 ) (2), unconventional superconductivity (e.g., PrOs 4 Sb 12 ) (3, 4), heavy fermion behavior (e.g., PrFe 4 P 12 , PrOs 4 Sb 12 ) (5-8), antiferroquadrupolar order (e.g., PrFe 4 P 12 , PrOs 4 Sb 12 ), and magnetic order (e.g., PrFe 4 Sb 12 ) (9, 10). In this article, we report measurements of the te...

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“…Because they make very good thermoelectrics 21,22,47 , host unusual metalinsulator transitions [23][24][25] , can be rare-earth magnets, heavyfermion compounds [26][27][28][29][30] , non-Fermi liquids [31][32][33][34][35] , itinerant ferromagnets [36][37][38] and superconductors 27,[39][40][41][42][43][44][45][46] , and have been proposed as topological insulators 48 , filled skutterudites are a very important class of non-molecular solids. Because the electronic and magnetic properties of solids depend critically on the actual atoms making up the compounds in addition to the compound's electron count, expanding the filled skutterudites from primarily group 8 to group 9 metal-based compounds, as we have done in this study, affords the opportunity to observe many new physical properties.…”

mentioning

confidence: 99%

A large family of filled skutterudites stabilized by electron count

et al. 2015

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The Zintl concept is important in solid-state chemistry to explain how some compounds that combine electropositive and main group elements can be stable at formulas that at their simplest level do not make any sense. The electronegative elements in such compounds form a polyatomic electron-accepting molecule inside the solid, a 'polyanion', that fills its available energy states with electrons from the electropositive elements to obey fundamental electroncounting rules. Here we use this concept to discover a large family of filled skutterudites based on the group 9 transition metals Co, Rh, and Ir, the alkali, alkaline-earth, and rare-earth elements, and Sb 4 polyanions. Forty-three new filled skutterudites are reported, with 63 compositional variations-results that can be extended to the synthesis of hundreds of additional new compounds. Many interesting electronic and magnetic properties can be expected in future studies of these new compounds.

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Low-temperature properties of rare-earth and actinide iron phosphide compoundsMFe4P12

Cited by 202 publications

References 12 publications

NMR study of filled skutterudite NdOs₄P₁₂

NMR study of filled skutterudite NdOs₄P₁₂

Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs₄As₁₂

A large family of filled skutterudites stabilized by electron count

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Low-temperature properties of rare-earth and actinide iron phosphide compoundsMFe4P12

Cited by 202 publications

References 12 publications

NMR study of filled skutterudite NdOs4P12

NMR study of filled skutterudite NdOs4P12

Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs4As12

A large family of filled skutterudites stabilized by electron count

Contact Info

Product

Resources

About

NMR study of filled skutterudite NdOs₄P₁₂

NMR study of filled skutterudite NdOs₄P₁₂

Field-dependent ordered phases and Kondo phenomena in the filled skutterudite compound PrOs₄As₁₂