2020
DOI: 10.3390/ma13173865
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Antiferromagnetic Ordering and Transport Anomalies in Single-Crystalline CeAgAs2

Abstract: 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 … Show more

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Cited by 4 publications
(3 citation statements)
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“…From figure 2(d), we notice that T 1 increases with increasing field (from 22 K at 500 Oe to 75 K at 5 T), T 2 decreases with increasing field (from 118 K at 500 Oe to 64 K at 9 T), and T 3 increases with increasing field (from 188 K at 500 Oe to 235 K at 5 T). These observations clearly suggest that T 1 and T 3 are ferromagneticlike transitions, while T 2 is an AFM-like transition [40][41][42]. Further, we find T 4 at around 250 K, visible only at lower applied fields (<1T) almost field-independent.…”
Section: Magnetic Propertiessupporting
confidence: 63%
“…From figure 2(d), we notice that T 1 increases with increasing field (from 22 K at 500 Oe to 75 K at 5 T), T 2 decreases with increasing field (from 118 K at 500 Oe to 64 K at 9 T), and T 3 increases with increasing field (from 188 K at 500 Oe to 235 K at 5 T). These observations clearly suggest that T 1 and T 3 are ferromagneticlike transitions, while T 2 is an AFM-like transition [40][41][42]. Further, we find T 4 at around 250 K, visible only at lower applied fields (<1T) almost field-independent.…”
Section: Magnetic Propertiessupporting
confidence: 63%
“…This scenario is different from the square net structured materials in the CeTX 2 family where the square net As 4p contributions at ϵ F is larger than other As contributions [7]. The distortion in the square-net leads to a transfer of As3 4p contributions away from ϵ F lowering the total energy of the system [17]. The energy distribution of As3 4p PDOS is different from the PDOS distributions of As1/As2, Ce and Ag valence states reflecting weak hybridization between them consistent with the behavior expected from the structural parameters.…”
Section: Resultsmentioning
confidence: 84%
“…CeAgAs 2 exhibits two antiferromagnetic transitions with Néel temperatures, 6 K and 4.9 K [16,17]. Transport measurements show negative logarithmic increase of the electrical resistivity below 25 K suggesting a Kondo-like behavior.…”
Section: Introductionmentioning
confidence: 97%