Intriguing magnetic and electrical transport behavior in novel CeTAs2 (T=Cu, Ag, Au) compounds

Szlawska, Maria; Kaczorowski, D.

doi:10.1016/j.jallcom.2007.04.108

Cited by 11 publications

(7 citation statements)

References 6 publications

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“…[ 9 , 11 ] but the same as that of the lower-temperature transition in Refs. [ 6 , 12 ]. In contrast to the behavior of

, no maximum is seen in the

variation (some little effect can be attributed to small misalignment of the specimen), and in this case the susceptibility shows below

a plateau characteristic for antiferromagnets probed perpendicular to the direction of magnetic moments.…”

Section: Resultsmentioning

confidence: 99%

“…Most of compounds with composition CeTX 2 , where T is a transition metal and X stands for a pnictogen, crystallize with the tetragonal HfCuSi 2 -type structure (space group

/nmm) or its derivatives. They were reported to show large variety of physical behaviors, e.g., field-induced quantum criticality in CeAuSb 2 [ 1 ], strongly anomalous low-temperature characteristics in CeCuAs 2 [ 2 ], or different types of magnetic ordering [ 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the first report on the magnetic properties of CeAgAs 2 , the compound was characterized as an antiferromagnet (AFM) with the Néel temperature

of 5.5 K, and a metamagnetic (MM) transition in a field of 0.46 T at the temperature

K [ 9 ]. Subsequent investigations, performed on powder samples, showed that CeAgAs 2 undergoes two AFM-like transitions at

K and

K [ 6 ]. The neutron diffraction experiments confirmed the AFM ordering below

and the MM transition in a field of

in the temperatures between 4 and 6 K [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

et al. 2020

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Single crystals of the ternary cerium arsenide CeAgAs2 were grown by chemical vapor transport. They were studied by means of x-ray diffraction, magnetization, heat capacity and electrical transport measurements. The experimental research was supplemented with electronic band structure calculations. The compound was confirmed to order antiferromagnetically at the Néel temperature of 4.9 K and to undergo metamagnetic transition in a field of 0.5 T at 1.72 K. The electrical resistivity shows distinct increase at low temperatures, which origin is discussed in terms of pseudo-gap formation in the density of states at the Fermi level and quantum corrections to the resistivity in the presence of atom disorder due to crystal structure imperfections.

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“…[ 9 , 11 ] but the same as that of the lower-temperature transition in Refs. [ 6 , 12 ]. In contrast to the behavior of

, no maximum is seen in the

variation (some little effect can be attributed to small misalignment of the specimen), and in this case the susceptibility shows below

a plateau characteristic for antiferromagnets probed perpendicular to the direction of magnetic moments.…”

Section: Resultsmentioning

confidence: 99%

“…Most of compounds with composition CeTX 2 , where T is a transition metal and X stands for a pnictogen, crystallize with the tetragonal HfCuSi 2 -type structure (space group

Section: Introductionmentioning

confidence: 99%

“…In the first report on the magnetic properties of CeAgAs 2 , the compound was characterized as an antiferromagnet (AFM) with the Néel temperature

of 5.5 K, and a metamagnetic (MM) transition in a field of 0.46 T at the temperature

K [ 9 ]. Subsequent investigations, performed on powder samples, showed that CeAgAs 2 undergoes two AFM-like transitions at

K and

K [ 6 ]. The neutron diffraction experiments confirmed the AFM ordering below

and the MM transition in a field of

in the temperatures between 4 and 6 K [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

et al. 2020

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“…If conduction electrons are assumed to play a role in mediating the magnetic coupling between RE atoms, a more important effect may be that the Fermi level is adjusted on progressing from NdAgAs 2 to NdAg 0.5 Zn 0.5 As 2 . Related ternary arsenides REMAs 2 (M = Cu, Ag, Au) also tend to exhibit small negative Weiss parameters and the occurrence of antiferromagnetic ordering (typically at less than 10 K) seems to be quite sensitive to subtle structural features [46][47][48][49].…”

Section: Resultsmentioning

confidence: 99%

Quaternary rare-earth arsenides REAg1−Zn As2 (RE=La–Nd, Sm, Gd–Dy) with tetragonal SrZnBi2- and HfCuSi2-type structures

Ramachandran

Genet

Mar

2015

Journal of Solid State Chemistry

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“…In particular, the ThCr 2 Si 2 -derived tetragonal compounds have attracted a lot of interest in this respect. The arsenic compounds with 1:1:2 composition, e.g., HfCuSi 2 -type layered structure [1][2][3] -a defective variant of the ThCr 2 Si 2 structure -however, has not been explored sufficiently for magnetic and superconducting anomalies, barring a few reports on Cu-based compounds RCuAs 2 (R = rare earth metals) [4][5][6][7][8]. Though corresponding Ag and Au-based compounds were also identified [8][9][10], very little work has been reported on these compounds.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and electrical transport anomalies of RMAs₂(R = Pr and Sm, M = Ag and Au)

Mukherjee

Sampathkumaran

Rutzinger

et al. 2009

J. Phys.: Condens. Matter

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The results of magnetization, heat-capacity and electrical resistivity (ρ) studies of the compounds, RMAs 2 (R= Pr and Sm; M= Ag, Au), crystallizing in HfCuSi 2 -derived structure are reported. PrAgAs 2 orders antiferromagnetically at T N = 5 K. The Au analogue, however, does not exhibit long range magnetic order down to 1.8 K. We infer that this is due to subtle differences in their crystallographic features, particularly noting that both the Sm compounds with identical crystal structure as that of former order magnetically nearly at the same temperature (about 17 K). It appears that, in PrAgAs 2 , SmAgAs 2 , and SmAuAs 2 , there is an additional magnetic transition at a lower temperature, as though the similarity in the crystal structure results in similarities in magnetism as well. The ρ for PrAgAs 2 and PrAuAs 2 exhibits negative temperature coefficient in some temperature range in the paramagnetic state. SmAuAs 2 exhibits magnetic Brillouin-zone gap effect in ρ at T N , while SmAgAs 2 shows a well-defined broad minimum well above T N around 45 K. Thus, these compounds reveal interesting magnetic and transport properties. Introduction Following the discovery of superconductivity in the arsenide family in recent years, there have been explosive activities on arsenic containing transition-metal compounds. In particular, the ThCr 2 Si 2 -derived tetragonal compounds have attracted a lot of interest in this respect. The arsenic compounds with 1:1:2 composition, e.g., HfCuSi 2 -type layered structure [1-3] -a defective variant of the ThCr 2 Si 2 structure -however, has not been explored sufficiently for magnetic and superconducting anomalies, barring a few reports on Cu-based compounds RCuAs 2 (R = rare earth metals) [4][5][6][7][8]. Though corresponding Ag and Au-based compounds were also identified [8-10], very little work has been reported on these compounds. Considering that the Cu-based compounds, even for those rare-earths with 4f-stability, have been reported to exhibit interesting properties, we considered it worthwhile to probe these Ag and Au containing compounds as well. We believe that the knowledge thus gathered would eventually contribute to global understanding of the properties of the arsenide family. Among these Ag and Au compounds, interesting Kondo anomalies for Ce analogues have been reported in the recent literature [7]. Here we report the results of our investigation on the compounds PrMAs 2 and SmMAs 2 with M = Ag and Au. We find that the temperature (T) dependencies of the electrical resistivity (ρ) of these compounds are interesting and notso-commonly known for Pr and Sm compounds.

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Intriguing magnetic and electrical transport behavior in novel CeTAs2 (T=Cu, Ag, Au) compounds

Cited by 11 publications

References 6 publications

Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

Quaternary rare-earth arsenides REAg1−Zn As2 (RE=La–Nd, Sm, Gd–Dy) with tetragonal SrZnBi2- and HfCuSi2-type structures

Magnetic and electrical transport anomalies of RMAs₂(R = Pr and Sm, M = Ag and Au)

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Intriguing magnetic and electrical transport behavior in novel CeTAs2 (T=Cu, Ag, Au) compounds

Cited by 11 publications

References 6 publications

Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

Quaternary rare-earth arsenides REAg1−Zn As2 (RE=La–Nd, Sm, Gd–Dy) with tetragonal SrZnBi2- and HfCuSi2-type structures

Magnetic and electrical transport anomalies of RMAs2(R = Pr and Sm, M = Ag and Au)

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Magnetic and electrical transport anomalies of RMAs₂(R = Pr and Sm, M = Ag and Au)