Magnetic/structural phase diagram and enhanced giant magnetoresistance in Zn-doped antiperovskite compound Ga1−xZnxCMn3

Li, C.C.; Wang, Bosen; Lin, Shiwei; Lin, Jiazao; Tong, P.; Lu, W. J.; Sun, Yan

doi:10.1016/j.jmmm.2011.03.038

Cited by 8 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One such example is the Mn-based antiperovskite structural compounds, Mn 3 AX (A = metal or semiconducting elements and X = C or N), which have attracted considerable attention due to their electrical and magnetic transport properties [51], with a magnetic state and transition temperature strongly affected by A element doping [52].…”

Section: Magnetismmentioning

confidence: 99%

Synthesis and Characterization of New MAX Phase Alloys

Mockuté¹

2014

View full text Add to dashboard Cite

The cover image is based on a cross-sectional TEM micrograph of a high current pulsed cathodic arc deposited (Cr 0.8 Mn 0.2 ) 2 AlC thin film (20 nm thickness), revealing its island-like nature. © Aurelija MockutėISBN: 978-91-7519-407-3 ISSN 0345-7524 Printed by LiU-Tryck Linköping, Sweden, 2014 AbstractThis Thesis explores synthesis and characterization of new MAX phase alloys (M = early transition metal, A = A-group element, and X = C or N), based on incorporation of M and X elements previously not considered. My primary focus is on M = Mn for attaining magnetic properties, and on X = O for potential tuning of the transport properties. A recent theoretical study predicted (Cr 1-x Mn x ) 2 AlC MAX phase to be a stable magnetic nanolaminate. I aimed at realizing this material and through a combinatorial approach based on magnetron sputtering from elemental targets, the first experimental evidence of Mn incorporation (x = 0.16) in a MAX phase is presented. The corresponding MAX phase was also synthesized using cathodic arc film deposition (x = 0.20) and bulk synthesis methods (x = 0.06). The primary characterization techniques were X-ray diffraction and high-resolution (scanning) transmission electron microscopy in combination with energy dispersive X-ray spectroscopy and/or electron energy loss spectroscopy, to obtain a precise local quantification of the MAX phase composition and to perform lattice resolved imaging. For epitaxial film growth of (Cr 1-x Mn x ) 2 AlC, evidence is presented for the formation of (Cr 1-y Mn y ) 5 Al 8 , exhibiting a bcc structure with an interplanar spacing matching exactly half a unit cell of the hexagonal MAX phase. Consequently, routinely performed X-ray diffraction symmetric θ-2θ measurements result in peak positions that are identical for the two phases. As (Cr 1-y Mn y ) 5 Al 8 is shown to display a magnetic response, its presence needs to be taken into consideration when evaluating the magnetic properties of the MAX phase. Methods to distinguish between Populärvetenskaplig sammanfattningMaterialvetenskap inkluderar forskning på material, dess syntes, struktur och sammansättning samt resulterande egenskaper, med fokus på att utveckla nya material skräddarsydda för specifika ändamål.En viktig del inom materialvetenskapen är forskning på tunna filmer, d.v.s. lager av material med tjocklek från ett atomlager till några mikrometer. Egenskaperna hos en yta, till exempel friktion, slitmotstånd, ledningsförmåga, eller utseende, kan förbättras genom att applicera en lämplig tunnfilm.Den här avhandlingen handlar om en grupp material som kallas MAX-faser. M står för en övergångsmetall (t.ex. Ti, Cr, Nb, Sc), A för ett element från grupp A i det periodiska systemet (t.ex. Al, Si, Ge, Ga), och X står för C eller N. Atomer av tre sådana olika element staplas i en struktur bestående av rena atomlager, t.ex. M-X-M-A-M-X-M-A. Ti 2 AlC, Cr 2 AlC, Ti 3 SiC 2 och Ti 4 AlN 3 är några exempel av mer än 60 hittills upptäckta MAX-faser. Det extra spännande med MAX-faser är att de kombinerar ...

show abstract

Section: Magnetismmentioning

confidence: 99%

Synthesis and Characterization of New MAX Phase Alloys

Mockuté¹

2014

View full text Add to dashboard Cite

show abstract

“…Doping creates a local positive or negative pressure, known as chemical pressure which alters the interatomic distances, bond angles or even the crystal structure of a material affecting its properties. Even in Mn based antiperovskites of type ABMn 3 which exhibit a variety of phase transitions and technologically significant phenomena, doping has been used quite effectively to improve the properties or render a material functional [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Phase separation and effect of strain on magnetic properties of Mn$_3$Ga$_{1-x}$Sn$_x$C

Dias,

Das,

Hoser

et al. 2018

Preprint

View full text Add to dashboard Cite

While the unit cell volume of compounds belonging to the Mn 3 Ga 1−x Sn x C, (0 ≤ x ≤ 1) series shows a conformity with Vegard's law, their magnetic and magnetocaloric properties behave differently from those of parent compounds Mn 3 GaC and Mn 3 SnC. A correlation between the observed magnetic properties and underlying magnetic and local structure suggests that replacing Ga atoms by larger atoms of Sn results in the formation of Ga-rich and Sn-rich clusters. As a result, even though the long range structure appears to be cubic, Mn atoms find themselves in two different local environments. The packing of these two different local structures into a single global structure induces tensile/compressive strains on the Mn 6 C functional unit and is responsible for the observed magnetic properties across the entire solid solution range.

show abstract