Anomalous transverse effects in nodal line compounds Co2TaX (X = Al, Ga)

Rambabu, P. and C.V., Anusree and Manivel Raja, M. and Kanchana, V. (2022) Anomalous transverse effects in nodal line compounds Co2TaX (X = Al, Ga). Journal of Magnetism and Magnetic Materials, 562. pp. 1-10. ISSN 0304-8853

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Abstract

The magnetic ground state, electronic, and elastic properties of Co2TaX (X = Al, Ga) are investigated using Density functional theory calculations. The compounds are found to possess mechanical and dynamical stability. Both the compounds exhibit nodal line features in the majority spin channel without the inclusion of spin-orbit coupling (SOC) and become gapped lines when SOC is added. The anomalous Hall effect and anomalous Nernst effect caused by Berry curvature are investigated. Within the region of +/- 300meV around Fermi level, the maximum values of anomalous Hall conductivities (AHC) are -602.8 S/cm and -593.8 S/cm, while anomalous Nernst conductivities (ANC) are -4.989 Am-1K-1 and 4.934 Am-1K-1 respectively, for Co2TaX (X = Al, Ga) compounds. Through the Heisenberg magnetic exchange interactions, the Curie temperatures (T-C) for both Co2TaX (X = Al, Ga) compounds are calculated to be 560.7 K and 556.3 K within the mean-field approximation (MFA). The magneto-optical response is also examined, and the polar Kerr rotation angles for Co2TaAl and Co2TaGa at normal incidence were determined to be 0.11 degrees and 1.35 degrees, respectively. As a result, this study may pave the way for precise property engineering in real-world applications.

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IITH Creators:

IITH Creators	ORCiD
Kanchana, V.	UNSPECIFIED

Item Type:

Article

Additional Information:

The authors PR and VK would like to thank IIT Hyderabad and National PARAM Supercomputing Facility (NPSF) and Centre for Development of Advanced Computing (C-DAC), Pune for computational facility and PR acknowledges Guru Ghasidas Vishwavidyalaya, Bilaspur, C.G. for sponsoring Ph.D. Authors would like to acknowledge Alexander N. Rudenko for fruitful discussions and critical reading of the manuscript. A C.V and VK acknowledges DRDO project with reference number (ERIP/ER/201701001/M/01/1711).

Uncontrolled Keywords:

SpintronicsBerry curvatureAnomalous Hall effectAnomalous Nernst effectMagneto-optic Kerr effect

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

22 Oct 2022 04:12

Last Modified:

22 Oct 2022 04:12