Complex transport and magnetism of the ternary boride YbPt₅B₂

Autor(en)

Leonid P. Salamakha, O. Sologub, Alexander Riss, Herwig Michor, Herbert Müller, Berthold Stöger, Gerald Giester, Peter Franz Rogl, Akito Sakai, P Gegenwart, E. Bauer

Abstrakt

Novel ternary platinum borides YbPt5B2 and LuPt5B2 have been synthesized by arc melting of constituent elements and subsequent annealing at 1020 K. The unit cell of YbPt5B2 [YbPt5B2 type, monoclinic space group C2/m, a=15.4982(6)Å, b=5.5288(3)Å, c=5.5600(3)Å, β=105.367(3)∘, single-crystal x-ray diffraction data] is composed of two structural fragments alternating along the a axis and extending infinitively along the b axis: (i) columns of face-fused, boron-filled, and empty edge-connected trigonal metal prisms, and (ii) zigzag chains of B-filled trigonal prisms connected by common edges. LuPt5B2 was found to be isotypic (Rietveld refinement of powder x-ray diffraction data). YbPt5B2 exhibits two magnetic phase transitions at Tmag1∼8K and Tmag2∼4K as deduced from specific heat, magnetostriction, electric resistivity, and magnetization data. The Kadowaki-Woods ratio of 1.22×10-5μωcm(molK/mJ)2 classifies YbPt5B2 as a heavy fermion system. A magnetic phase diagram was established, using magnetostriction and magnetoresistance data. Nonmagnetic LuPt5B2 is characterized by a simple metallic behavior.

Organisation(en)

Institut für Mineralogie und Kristallographie, Institut für Materialchemie

Externe Organisation(en)

Universität Augsburg, Technische Universität Wien, Ivan Franko National University of Lviv

Journal

Physical Review B

Band

105

Anzahl der Seiten

14

ISSN

2469-9950

DOI

https://doi.org/10.1103/PhysRevB.105.205112

Publikationsdatum

05-2022

Peer-reviewed

Ja

ÖFOS 2012

105116 Mineralogie, 104011 Materialchemie, 105113 Kristallographie, 202014 Elektromagnetismus

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Condensed Matter Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/befaf20a-5204-4b8e-b272-eb50bee930e8