Zur Seitenansicht
 

Titelaufnahme

Titel
(Pt1-xCux)3Cu2B and Pt9Cu3B5, the first examples of copper platinum borides. Observation of superconductivity in a novel boron filled -Mn-type compound
VerfasserSalamakha, Leonid ; Sologub, Oksana ; Stöger, Berthold ; Michor, Herwig In der Gemeinsamen Normdatei der DNB nachschlagen ; Bauer, Ernst In der Gemeinsamen Normdatei der DNB nachschlagen ; Rogl, Peter In der Gemeinsamen Normdatei der DNB nachschlagen
Erschienen in
Journal Solid State Chemistry, 2015, Jg. 229, S. 303-309
ErschienenElsevier, 2015
Ausgabe
Accepted version
SpracheEnglisch
DokumenttypAufsatz in einer Zeitschrift
Schlagwörter (EN)Copper Platinum Borides / Crystal Structure / Electrical Transport Properties
Projekt-/ReportnummerAustrian Science Fund (FWF): V279-N19
ISSN1095-726X
URNurn:nbn:at:at-ubtuw:3-3212 Persistent Identifier (URN)
DOI10.1016/j.jssc.2015.06.004 
Zugriffsbeschränkung
 Das Werk ist frei verfügbar
Dateien
(Pt1-xCux)3Cu2B and Pt9Cu3B5, the first examples of copper platinum borides. Observation of superconductivity in a novel boron filled -Mn-type compound [4.31 mb]
Links
Nachweis
Klassifikation
Zusammenfassung (Englisch)

New ternary copper platinum borides have been synthesized by arc melting of pure elements followed by annealing at 600 C. The structures have been studied by X-ray single crystal and powder diffraction. (Pt1-xCux)3Cu2B (x=0.33) forms a B-filled -Mn-type structure (space group P4132; a=0.6671(1) nm). Cu atoms are distributed preferentially on the 8c atom sites, whereas the 12d site is randomly occupied by Pt and Cu atoms (0.670(4) Pt/0.330(4) Cu). Boron is located in octahedral voids of the parent -Mn-type structure. Pt9Cu3B5 (space group P-62m; a=0.9048(3) nm, c=0.2908(1) nm) adopts the Pt9Zn3B5--type structure. It has a columnar architecture along the short translation vector exhibiting three kinds of [Pt6] trigonal prism columns (boron filled, boron semi-filled and empty) and Pt channels with a pentagonal cross section filled with Cu atoms. The striking structural feature is a [Pt6] cluster in form of an empty trigonal prism at the origin of the unit cell, which is surrounded by coupled [BPt6] and [Pt6] trigonal prisms, rotated perpendicularly to the central one. There is no B-B contact as well as Cu-B contact in the structure. The relationships of Pt9Cu3B5 structure with the structure of Ti1+xOs2xRuB2 as well as with the structure families of metal sulfides and aluminides have been elucidated.

(Pt1-xCux)3Cu2B (x=0.3) (B-filled -Mn-type structure) is a bulk superconductor with a transition temperature of about 2.06 K and an upper critical field 0HC2(0)WHH of 1.2 T, whereas no superconducting transition has been observed up to 0.3 K in Pt9Cu3B5 (Pt9Zn3B5--type structure) from electrical resistivity measurements.

Lizenz
CC-BY-NC-ND-Lizenz (4.0)Creative Commons Namensnennung - Nicht kommerziell - Keine Bearbeitung 4.0 International Lizenz