Crystal growth and magnetic behavior of R6T13−xAlxMy phases (R=La, Nd; T=Mn, Fe; M=main group) grown from lanthanide-rich eutectic fluxes

Benbow, Evan M.; Dalal, Naresh S.; Latturner, Susan E.

doi:10.1016/j.jssc.2009.08.011

Cited by 23 publications

(26 citation statements)

References 28 publications

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“…Similar contamination from reduction of the alumina crucible is seen in the flux syntheses of Ce 33 Fe 14-x Al x B 25 C 34 , La 6 Fe 13-x Al x Sn y , and La 21 Mn 8 Ge 6.2 Al 0.8 C 12 [6][7][8]. While the aluminum in these phases is found to partially occupy a mixed site with a late transition metal or main group metalloid of similar size, incorporation of this dopant is often required to stabilize the structure; the yield is increased if Al is deliberately added as a dopant, and different products are formed in the absence of aluminum (for instance if steel crucibles are used).…”

Section: Synthesismentioning

confidence: 91%

“…Our past investigations have demonstrated that eutectic mixtures of early lanthanide elements (Ln = La, Ce, Pr, Nd) with late first row transition metals (T = Fe, Co, Ni) are excellent solvents for the discovery and crystal growth of complex lanthanide-rich intermetallic compounds [2][3][4][5][6][7][8]. For example, both Nd and Co have high melting points, but when combined in a 64%/36% Nd/Co mole ratio a eutectic is formed with a low melting point (566°C) [9].…”

Section: Introductionmentioning

confidence: 99%

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Nd8Co4−Al Ge2C3: A case study in flux growth of lanthanide-rich intermetallics

Zhou

Latturner

2016

Journal of Solid State Chemistry

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The intermetallic Nd 8 Co 4-x Al x Ge 2 C 3 (x ≈ 0.65) was prepared from reaction of germanium and carbon in Nd/Co eutectic flux in an alumina crucible. This phase exhibits a new structure type in orthorhombic space group Pbcm, with unit cell parameters a = 8.001(1) Å, b = 11.696 (2) Å, c = 15.020(3) Å (Z = 4; R 1 = 0.0234). The structure features germanium-centered neodymium clusters Ge@Nd 9 which share faces to form layers separated by zigzag chains of cobalt atoms capped by carbon. Density of states calculations confirm that this compound is metallic, and indicate that the cobalt should not have a magnetic moment. This is supported by magnetic susceptibility measurements which show a low temperature ferromagnetic ordering at T C = 50 K due to the Nd 3+ ions. Magnetization field dependence studies on single crystals indicate this compound is a strong ferromagnet with large anisotropy; the Nd 3+ magnetic moments align along the a-axis.

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Section: Synthesismentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Nd8Co4−Al Ge2C3: A case study in flux growth of lanthanide-rich intermetallics

Zhou

Latturner

2016

Journal of Solid State Chemistry

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“…Owing to special characteristics such as low viscosity and high electrical and thermal conductivity, liquid metals have found their place in applications such as soft electronics [106], stretchable devices [107], and microswitches [108]. To date, liquid metals have also been extensively investigated in chemistry, mostly for syntheses within bulk liquids and on liquid metal interfaces, as well as catalysts [109][110][111]. Liquid metals can also be used in the synthesis of nanostructures [112,113] or hydrogen production [114,115].…”

Section: Future Perspectivesmentioning

confidence: 99%

Liquid Marbles as Miniature Reactors for Chemical and Biological Applications

et al. 2020

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The need for miniaturised reaction systems has led to the development of various microreactor platforms, such as droplet-based microreactors. However, these microreactors possess inherent drawbacks, such as rapid evaporation and difficult handling, that limit their use in practical applications. Liquid marbles are droplets covered with hydrophobic particles and are a potential platform that can overcome the weaknesses of bare droplets. The coating particles completely isolate the interior liquids from the surrounding environment, thus conveniently encapsulating the reactions. Great efforts have been made over the past decade to demonstrate the feasibility of liquid marble-based microreactors for chemical and biological applications. This review systemically summarises state-of-the-art implementations of liquid marbles as microreactors. This paper also discusses the various aspects of liquid marble-based microreactors, such as the formation, manipulation, and future perspectives.

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“…For example, isolated transition metal sites or small transition metal clusters in intermetallics such as NdCoC 2 , NdCoGe 3 , and R 2 Co 2 SiC (R=Pr, Nd) tend to be nonmagnetic [9][10][11]. On the other hand, phases containing larger transition metal building blocks, such as the Fe 13 clusters in Ce 33 Fe 13 B 18 C 34 , Fe layers in Nd 6 Fe 10 Al 3 , and Fe networks of Nd 2 Fe 14 B, will have strong magnetic moments on the transition metal atoms, and might even exhibit unusual magnetic phenomena such as multiple ordering transitions or spin glass behavior [12,13,3].…”

Section: Introductionmentioning

confidence: 99%

Flux growth and magnetic properties of rare earth cobalt germanide, RE6Co5Ge1+xAl3−x (RE=Pr, Nd; x≈0.8)

Zhou

Latturner

2016

Journal of Solid State Chemistry

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The intermetallic compounds RE 6 Co 5 Ge 1+x Al 3-x (RE=Pr , Nd) were synthesized from the reaction of germanium and aluminum in RE/Co eutectic flux. These phases crystallize with the Nd 6 Co 5 Ge 2.2 structure type in hexagonal space group P-6m2 (a = 9.203(2)Å, c = 4.202(1) Å, R 1 = 0.0109 for Pr 6 Co 5 Ge 1.80 Al 2.20 ; and a = 9.170(3) Å, c = 4.195(1) Å, R 1 = 0.0129 for Nd 6 Co 5 Ge 1.74 Al 2.26). The structure features chains of face-sharing Ge@RE 9 clusters intersecting hexagonal cobalt nets linked by aluminum atoms. Magnetic susceptibility measurements indicate that both phases exhibit ferromagnetic ordering of the cobalt layers with T C in the range of 130-140 K. The magnetic moments of the rare earth ions order at lower temperature (30-40 K). Magnetic measurements on oriented crystals of Nd 6 Co 5 Ge 1.74 Al 2.26 show a strong preference of the moments to order along the c-axis.

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Crystal growth and magnetic behavior of R6T13−xAlxMy phases (R=La, Nd; T=Mn, Fe; M=main group) grown from lanthanide-rich eutectic fluxes

Cited by 23 publications

References 28 publications

Nd8Co4−Al Ge2C3: A case study in flux growth of lanthanide-rich intermetallics

Nd8Co4−Al Ge2C3: A case study in flux growth of lanthanide-rich intermetallics

Liquid Marbles as Miniature Reactors for Chemical and Biological Applications

Flux growth and magnetic properties of rare earth cobalt germanide, RE6Co5Ge1+xAl3−x (RE=Pr, Nd; x≈0.8)

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