Theoretical stability, thin film synthesis and transport properties of the Mon+1GaCn MAX phase

Rahele Meshkian; Arni Sigurdur Ingason; Martin Dahlqvist; Andrejs Petruhins; Unnar B. Arnalds; Fridrik Magnus; Jun Lu; Johanna Rosen

doi:10.1002/pssr.201409543

Theoretical stability, thin film synthesis and transport properties of the Mon+1GaCn MAX phase

Rahele Meshkian
, Arni Sigurdur Ingason
, Martin Dahlqvist
, Andrejs Petruhins
, Unnar B. Arnalds
, Fridrik Magnus
, Jun Lu
, Johanna Rosen

University of Iceland

Research output: Contribution to journal › Article › peer-review

Abstract

The phase stability of Mo_{n +1}GaC_n has been investigated using ab-initio calculations. The results indicate stability for the Mo₂GaC phase only, with a formation enthalpy of -0.4 meV per atom. Subsequent thin film synthesis of Mo₂GaC was performed through magnetron sputtering from elemental targets onto Al₂O₃ [0001], 6H-SiC [0001] and MgO [111] substrates within the temperature range of 500 °C and 750 °C. High structural quality films were obtained for synthesis on MgO [111] substrates at 590 ^oC. Evaluation of transport properties showed a superconducting behavior with a critical temperature of approximately 7 K, reducing upon the application of an external magnetic field. The results point towards the first superconducting MAX phase in thin film form.

Original language	Undefined/Unknown
Pages (from-to)	197-201
Number of pages	5
Journal	Physica Status Solidi-Rapid Research Letters
Volume	9
Issue number	3
DOIs	https://doi.org/10.1002/pssr.201409543
Publication status	Published - 1 Mar 2015

Bibliographical note

Other keywords

Magnetron sputtering
MoGaC
Superconducting MAX phases
Thin films
ab-initio calculations

Access to Document

10.1002/pssr.201409543

Cite this

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title = "Theoretical stability, thin film synthesis and transport properties of the Mon+1GaCn MAX phase",

abstract = "The phase stability of Mon +1GaCn has been investigated using ab-initio calculations. The results indicate stability for the Mo2GaC phase only, with a formation enthalpy of -0.4 meV per atom. Subsequent thin film synthesis of Mo2GaC was performed through magnetron sputtering from elemental targets onto Al2O3 [0001], 6H-SiC [0001] and MgO [111] substrates within the temperature range of 500 °C and 750 °C. High structural quality films were obtained for synthesis on MgO [111] substrates at 590 oC. Evaluation of transport properties showed a superconducting behavior with a critical temperature of approximately 7 K, reducing upon the application of an external magnetic field. The results point towards the first superconducting MAX phase in thin film form.",

keywords = "Magnetron sputtering, MoGaC, Superconducting MAX phases, Thin films, ab-initio calculations",

author = "Rahele Meshkian and Ingason, \{Arni Sigurdur\} and Martin Dahlqvist and Andrejs Petruhins and Arnalds, \{Unnar B.\} and Fridrik Magnus and Jun Lu and Johanna Rosen",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

year = "2015",

month = mar,

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doi = "10.1002/pssr.201409543",

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T1 - Theoretical stability, thin film synthesis and transport properties of the Mon+1GaCn MAX phase

AU - Meshkian, Rahele

AU - Ingason, Arni Sigurdur

AU - Dahlqvist, Martin

AU - Petruhins, Andrejs

AU - Arnalds, Unnar B.

AU - Magnus, Fridrik

AU - Lu, Jun

AU - Rosen, Johanna

PY - 2015/3/1

Y1 - 2015/3/1

N2 - The phase stability of Mon +1GaCn has been investigated using ab-initio calculations. The results indicate stability for the Mo2GaC phase only, with a formation enthalpy of -0.4 meV per atom. Subsequent thin film synthesis of Mo2GaC was performed through magnetron sputtering from elemental targets onto Al2O3 [0001], 6H-SiC [0001] and MgO [111] substrates within the temperature range of 500 °C and 750 °C. High structural quality films were obtained for synthesis on MgO [111] substrates at 590 oC. Evaluation of transport properties showed a superconducting behavior with a critical temperature of approximately 7 K, reducing upon the application of an external magnetic field. The results point towards the first superconducting MAX phase in thin film form.

AB - The phase stability of Mon +1GaCn has been investigated using ab-initio calculations. The results indicate stability for the Mo2GaC phase only, with a formation enthalpy of -0.4 meV per atom. Subsequent thin film synthesis of Mo2GaC was performed through magnetron sputtering from elemental targets onto Al2O3 [0001], 6H-SiC [0001] and MgO [111] substrates within the temperature range of 500 °C and 750 °C. High structural quality films were obtained for synthesis on MgO [111] substrates at 590 oC. Evaluation of transport properties showed a superconducting behavior with a critical temperature of approximately 7 K, reducing upon the application of an external magnetic field. The results point towards the first superconducting MAX phase in thin film form.

KW - Magnetron sputtering

KW - MoGaC

KW - Superconducting MAX phases

KW - Thin films

KW - ab-initio calculations

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