Anomalous Magnetic and Electrical Transport Behavior in Intermetallic Co&lt;sub&gt;58.5&lt;/sub&gt;Ga&lt;sub&gt;41.5&lt;/sub&gt;

Yasin, Sk Mohammad; Saha, Ritwik; Srinivas, V.; Kasiviswanathan, S.; Nigam, A. K.

doi:10.1109/tmag.2015.2448571

Cited by 3 publications

(2 citation statements)

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“…As a result, using the same prefactor of 1/15 is unlikely to be appropriate in our system that has much higher level of anisotropy and therefore requires a more suitable correction. A similar situation in case of Dy x Y 1−x Al 2 [51], GdAl 2 [52] and Co 58.5 Ga 41.5 [53] compounds had earlier been dealt by considering the prefactor to be of the order of 1. Accordingly, by considering a prefactor of order unity, H r reduces to 61.2 kOe, although interestingly H ex remains the same.…”

Section: Isothermal Magnetizationmentioning

confidence: 88%

Ferromagnetically correlated clusters in semimetallic Ru2NbAl Heusler alloy and its thermoelectric properties

et al. 2018

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In this work, we report the structural, magnetic and electrical and thermal transport properties of the Heusler-type alloy Ru 2 NbAl. From the detailed analysis of magnetization data, we infer the presence of superparamagnetically interacting clusters with a Pauli paramagnetic background, while short-range ferromagnetic interaction is developed among the clusters below 5 K. The presence of this ferromagnetic interaction is confirmed through heat capacity measurements. The relatively small value of electronic contribution to specific heat, γ (∼2.7 mJ/mol-K 2 ), as well as the linear nature of temperature dependence of Seebeck coefficient indicate a semi-metallic ground state with a pseudo-gap that is also supported by our electronic structure calculations. The activated nature of resistivity is reflected in the observed negative temperature coefficient and has its origin in the charge carrier localization due to antisite defects, inferred from magnetic measurements as well as structural analysis. Although the absolute value of thermoelectric figure of merit is rather low (ZT = 5.2 × 10 −3 ) in Ru 2 NbAl, it is the largest among all the reported nondoped full Heusler alloys.

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Section: Isothermal Magnetizationmentioning

confidence: 88%

Ferromagnetically correlated clusters in semimetallic Ru2NbAl Heusler alloy and its thermoelectric properties

et al. 2018

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show abstract

“…As a result, using the 1/15 prefactor is unlikely to be appropriate in our system and therefore requires a suitable correction. A similar situation in case of Dy x Y 1−x Al 2 [53], GdAl 2 [54], Co 58.5 Ga 41.5 [55] and Ru 2 NbAl [24] had earlier been dealt by considering the prefactor of the order of 1. Accordingly, by using a prefactor equal to unity, Eq.6 is modified to…”

Section: Isothermal Magnetizationmentioning

confidence: 83%