A Nanolaminated Magnetic Phase: Mn<sub>2</sub>GaC

Ingason, Arni Sigurdur; Mockuté, Aurelija; Dahlqvist, Martin; Magnus, Fridrik; Ólafsson, S.; Arnalds, Unnar B.; Alling, Björn; Abrikosov, Igor A.; Hjörvarsson, Bjørgvin; Persson, Per O. Å.; Rosén, Johanna

doi:10.1080/21663831.2013.865105

Cited by 145 publications

(155 citation statements)

References 32 publications

(33 reference statements)

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“…Phase stability calculations at 0 K have been proven successful when it comes to verify existing [12,14,22,26,81,[84][85][86] and, more importantly, predicting new MAX phases and related materials [3,7,25,87]. When it comes to magnetic MAX phases, almost all calculations to date neglect effects from temperature.…”

Section: A Methodsmentioning

confidence: 99%

“…[14,81]. In particular, the first magnetic MAX phases were predicted using DFT and evaluation of phase stability and subsequently synthesized [3,7,12,25]. The most successfull approach that has been used for evaluating the stability of a MAX phase of composition M n+1 AX n , defined as the formation enthalpy per atom ∆H(M n+1 AX n ), is to calculate the energy difference with respect to a set of competing phases,…”

Section: A Methodsmentioning

confidence: 99%

“…Guided by predictions from ab-initio calculations, Ingason et al [25] advanced beyond alloying and synthesized Mn 2 GaC samples as a heteroepitaxial thin film on MgO [111] substrates.…”

Section: A = Gamentioning

confidence: 99%

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Magnetic MAX phases from theory and experiments; a review

Ingason

Dahlqvist

Rosén

2016

J. Phys.: Condens. Matter

105

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This review presents MAX phases (M is a transition metal, A an A-group element, X is C or N), known for their unique combination of ceramic/metallic properties, as a recently uncovered family of novel magnetic nanolaminates. The first created magnetic MAX phases were predicted using density functional theory through evaluation of phase stability, and subsequently synthesized as heteroepitaxial thin films. All magnetic MAX phases reported to date, in bulk or thin film form, are based on Cr and/or Mn, and they include (Cr,Mn)2AlC, (Cr,Mn)2GeC, (Cr,Mn)2GaC, (Mo,Mn)2GaC, and (V,Mn)3GaC2, Cr2AlC, Cr2GeC and Mn2GaC. A variety of magnetic properties have been found, such as ferromagnetic response well above room temperature and structural changes linked to magnetic anisotropy. In this paper, theoretical as well as experimental work performed on these materials to date is critically reviewed, in terms of methods used, results acquired, and conclusions drawn. Open questions concerning magnetic characteristics are discussed, and an outlook focused on new materials, superstructures, property tailoring and further synthesis and characterization is presented.

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Section: A Methodsmentioning

confidence: 99%

Section: A Methodsmentioning

confidence: 99%

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Magnetic MAX phases from theory and experiments; a review

Ingason

Dahlqvist

Rosén

2016

J. Phys.: Condens. Matter

105

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“…Furthermore, the Mn 2 GaC magnetic compound has been synthesized as a heteroepitaxial thin film containing Mn as the exclusive M element. [10,17,18] The magnetic MAX phases have very large saturation fields (larger than 5 T) and a low ratio of remanentto-saturation magnetization. [15][16][17][18] The magnetization of these systems increases rapidly with decreasing temperature and usually does not show the characteristics of a conventional ferromagnet.…”

mentioning

confidence: 99%

“…[10,17,18] The magnetic MAX phases have very large saturation fields (larger than 5 T) and a low ratio of remanentto-saturation magnetization. [15][16][17][18] The magnetization of these systems increases rapidly with decreasing temperature and usually does not show the characteristics of a conventional ferromagnet. [15][16][17][18][19][20] These findings have been interpreted to be the result of competing FM and AFM correlations, [10] which can lead to non-collinear or ferrimagnetic spin structures.…”

mentioning

confidence: 99%

Magnetic Anisotropy in the (Cr_0.5Mn_0.5)₂GaC MAX Phase

Salikhov

Семисалова

Petruhins

et al. 2015

Materials Research Letters

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W‐Based Atomic Laminates and Their 2D Derivative W_1.33C MXene with Vacancy Ordering

et al. 2018

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Structural design on the atomic level can provide novel chemistries of hybrid MAX phases and their MXenes. Herein, density functional theory is used to predict phase stability of quaternary i-MAX phases with in-plane chemical order and a general chemistry (W M ) AC, where M = Sc, Y (W), and A = Al, Si, Ga, Ge, In, and Sn. Of over 18 compositions probed, only two-with a monoclinic C2/c structure-are predicted to be stable: (W Sc ) AlC and (W Y ) AlC and indeed found to exist. Selectively etching the Al and Sc/Y atoms from these 3D laminates results in W C-based MXene sheets with ordered metal divacancies. Using electrochemical experiments, this MXene is shown to be a new, promising catalyst for the hydrogen evolution reaction. The addition of yet one more element, W, to the stable of M elements known to form MAX phases, and the synthesis of a pure W-based MXene establishes that the etching of i-MAX phases is a fruitful path for creating new MXene chemistries that has hitherto been not possible, a fact that perforce increases the potential of tuning MXene properties for myriad applications.

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A Nanolaminated Magnetic Phase: Mn₂GaC

Cited by 145 publications

References 32 publications

Magnetic MAX phases from theory and experiments; a review

Magnetic MAX phases from theory and experiments; a review

Magnetic Anisotropy in the (Cr_0.5Mn_0.5)₂GaC MAX Phase

W‐Based Atomic Laminates and Their 2D Derivative W_1.33C MXene with Vacancy Ordering

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A Nanolaminated Magnetic Phase: Mn2GaC

Cited by 145 publications

References 32 publications

Magnetic MAX phases from theory and experiments; a review

Magnetic MAX phases from theory and experiments; a review

Magnetic Anisotropy in the (Cr0.5Mn0.5)2GaC MAX Phase

W‐Based Atomic Laminates and Their 2D Derivative W1.33C MXene with Vacancy Ordering

Contact Info

Product

Resources

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A Nanolaminated Magnetic Phase: Mn₂GaC

Magnetic Anisotropy in the (Cr_0.5Mn_0.5)₂GaC MAX Phase

W‐Based Atomic Laminates and Their 2D Derivative W_1.33C MXene with Vacancy Ordering