Synthesis, phase purification and magnetic characterization of the (Cr1−x, Mnx)2AlC MAX-phase

Sobolev, Kirill; Pazniak, Hanna; Farle, Michael; Rodionova, Valeria; Wiedwald, Ulf

doi:10.1039/d1tc03092b

Cited by 5 publications

(5 citation statements)

References 36 publications

(50 reference statements)

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“…The latter revealed ferromagnetic characteristics up to 230 K with potential toward spintronics or magnetocaloric applications. , Since then, in both thin-film and bulk synthesis approaches, many doping studies with manganese on the M -site have been reported. As parent phases, predominantly chromium-based (Cr 2 A C) phases with A = Al, , Ga, , and Ge , were studied. However, particularly bulk approaches have faced the problem of competing side phases leading to only small Mn amounts that can be incorporated into the MAX phase structure (e.g., (Cr 0.94 Mn 0.06 ) 2 AlC, (Cr 1– x Mn x ) 2 GeC; x ≤ 0.25).…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

et al. 2023

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MAX phases that exhibit long-range magnetic order in the bulk are still very hard to synthesize. Chromium and manganese are the cutoff elements when transitioning through the 3dmetals that still form stable full and doped MAX phases, respectively. An iron-based (on the M-site) bulk MAX phase does not exist. Therefore, other strategies to induce long-range magnetic ordering in bulk MAX phases are necessary to open the path to new functional materials. Here, we demonstrate the nonconventional synthesis of a hitherto unknown MAX phase solid-solution (V1–x Cr x )2GaC by microwave heating. The full series with 0 < x < 1 (x = 0.20, 0.40, 0.50, 0.60, 0.80) forms almost single phase with minimal differences in their morphology. Their magnetic properties, however, differ rather significantly, with a maximum susceptibility around x = 0.80. Both the experimental and theoretical/ab initio magnetic analysis confirm that the solid-solution (V1–x Cr x )2GaC is an itinerant Pauli paramagnet that almost fulfills the Stoner criterion for ferromagnetic order (for compositions with x around 0.80). This is a powerful insight into how chemical composition couples with electronic structure and the resulting bulk magnetic properties because it provides crucial guidelines to produce long-range ordered magnetic MAX phases.

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Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

et al. 2023

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“…[124] In 2021, Sobolev et al were able to increase the Mnamount even up to 16 at-% using the arc melting technique, however, the magnetic ordering is restricted to paramagnetism. [125] Other non-conventional bulk synthesis approaches were made by Siebert et al applying a sol-gel approach to synthesize manganese-doped Cr 2 GaC with a doping level up to 16 %. While not in the bulk, the authors found Mn-rich areas of the MAX phase that may be magnetically ordered.…”

Section: Later Transition Metals As M-elementsmentioning

confidence: 99%

“…In 2021, Sobolev et al . were able to increase the Mn‐amount even up to 16 at‐% using the arc melting technique, however, the magnetic ordering is restricted to paramagnetism [125] . Other non‐conventional bulk synthesis approaches were made by Siebert et al .…”

Section: Variation Of Mmentioning

confidence: 99%

Extending the Chemistry of Layered Solids and Nanosheets: Chemistry and Structure of MAX Phases, MAB Phases and MXenes

et al. 2023

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MAX phases are layered solids with unique properties combining characteristics of ceramics and metals. MXenes are their two‐dimensional siblings that can be synthesized as van der Waals stacked and multi‐/single‐layer nanosheets, which possess chemical and physical properties that make them interesting for a plethora of applications. Both families of materials are highly versatile in terms of their chemical composition and theoretical studies suggest that many more members are stable and can be synthesized. This is very intriguing because new combinations of elements, and potentially new structures, can lead to further (tunable) properties. In this review, we focus on the synthesis science (including non‐conventional approaches) and structure of members less investigated, namely compounds with more exotic M‐, A‐, and X‐elements, for example nitrides and (carbo)nitrides, and the related family of MAB phases.

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“…Recently, a new group of MAX phases was discovered with ordered quaternary [105][106][107][108][109][110][111], which expands MAX phases and opens a new window for tuning the nature of MAX phases and developing new MXenes. For example, Caspi et al [106] showed by high-resolution neutron diffraction analysis that the (Cr 0.5 V 0.5 ) n+1 AlC n system showed a strong tendency for V and Cr atoms to be ordered, with V occupying only the intermediate layer.…”

Section: Synthesis Of Mbenesmentioning

confidence: 99%

A Rising 2D Star: Novel MBenes with Excellent Performance in Energy Conversion and Storage

Wang

Xiong

et al. 2022

Nano-Micro Lett.

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As a flourishing member of the two-dimensional (2D) nanomaterial family, MXenes have shown great potential in various research areas. In recent years, the continued growth of interest in MXene derivatives, 2D transition metal borides (MBenes), has contributed to the emergence of this 2D material as a latecomer. Due to the excellent electrical conductivity, mechanical properties and electrical properties, thus MBenes attract more researchers' interest. Extensive experimental and theoretical studies have shown that they have exciting energy conversion and electrochemical storage potential. However, a comprehensive and systematic review of MBenes applications has not been available so far. For this reason, we present a comprehensive summary of recent advances in MBenes research. We started by summarizing the latest fabrication routes and excellent properties of MBenes. The focus will then turn to their exciting potential for energy storage and conversion. Finally, a brief summary of the challenges and opportunities for MBenes in future practical applications is presented.

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Synthesis, phase purification and magnetic characterization of the (Cr_1−x, Mn_x)₂AlC MAX-phase

Abstract: The Cr2AlC MAX phase is a promising parent compound to introduce magnetism to nano-laminated ternary carbides by doping with Mn.

Cited by 5 publications

References 36 publications

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

Extending the Chemistry of Layered Solids and Nanosheets: Chemistry and Structure of MAX Phases, MAB Phases and MXenes

A Rising 2D Star: Novel MBenes with Excellent Performance in Energy Conversion and Storage

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Synthesis, phase purification and magnetic characterization of the (Cr1−x, Mnx)2AlC MAX-phase

Abstract: The Cr2AlC MAX phase is a promising parent compound to introduce magnetism to nano-laminated ternary carbides by doping with Mn.

Cited by 5 publications

References 36 publications

Microwave-Assisted Synthesis of the New Solid-Solution (V1–xCrx)2GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

Microwave-Assisted Synthesis of the New Solid-Solution (V1–xCrx)2GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

Extending the Chemistry of Layered Solids and Nanosheets: Chemistry and Structure of MAX Phases, MAB Phases and MXenes

A Rising 2D Star: Novel MBenes with Excellent Performance in Energy Conversion and Storage

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Synthesis, phase purification and magnetic characterization of the (Cr_1−x, Mn_x)₂AlC MAX-phase

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80

Microwave-Assisted Synthesis of the New Solid-Solution (V_1–xCr_x)₂GaC (0 ≤ x ≤ 1), a Pauli Paramagnet Almost Matching the Stoner Criterion for x = 0.80