Electronic properties of a distorted kagome lattice antiferromagnet Dy3Ru4Al12 / Gorbunov D. I.,Henriques M. S.,Andreev A. V.,Gukasov A.,Petricek V.,Baranov N. V.,Skourski Y.,Eigner V.,Paukov M.,Prokleska J.,Goncalves A. P. // PHYSICAL REVIEW B. - 2014. - V. 90, l. 9.

ISSN/EISSN:

2469-9950 / 2469-9969

Type:

Article

Abstract:

Electronic properties of Dy3Ru4Al12 (hexagonal crystal structure, Dy atoms form distorted kagome nets) are studied on a single crystal by means of magnetization, neutron diffraction, specific heat, and resistivity measurements. The onset of a long-range magnetic order of Dy moments occurs at 7 K through a first-order phase transition. The compound has a noncollinear antiferromagnetic structure with a propagation vector (1/2 0 1/2). The configuration of the Dy moments is consistent with the monoclinic Shubnikov group C(c)2/c. The gamma coefficient in the temperature linear term of the specific heat is strongly enhanced to 500 mJ mol(-1) K-2 taking into account the localized nature of Dy magnetism. An additional contribution originates from spin fluctuations induced in the 4d subsystem of Ru by the exchange field acting from the Dy 4f moments. In an applied magnetic field Dy3Ru4Al12 displays magnetization jumps along all crystallographic directions. All the metamagnetic transitions are accompanied by large positive magnetoresistance. The maximum effect (125\%-140\%) is attained for current along the {[}100] axis and field along the {[}120] or {[}001] axes. The large positive effect is explained by changes in the conduction electron spectra through the jumps as the conduction electrons interact with localized magnetic moments.

Author keywords:

GLASS-LIKE BEHAVIOR; MAGNETIC-PROPERTIES; SPIN-GLASS; INTERMETALLIC COMPOUNDS; HEAT-CAPACITY; PYROCHLORE ANTIFERROMAGNET; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; GD3RU4AL12 TYPE; ORDER

DOI:

10.1103/PhysRevB.90.094405

Web of Science ID:

ISI:000341263700004

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	SEP 4
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	094405
EISSN	2469-9969
Keywords-Plus	GLASS-LIKE BEHAVIOR; MAGNETIC-PROPERTIES; SPIN-GLASS; INTERMETALLIC COMPOUNDS; HEAT-CAPACITY; PYROCHLORE ANTIFERROMAGNET; PHASE-TRANSITIONS; CRYSTAL-STRUCTURE; GD3RU4AL12 TYPE; ORDER
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	gorbunov@fzu.cz
ResearcherID-Numbers	Prokleska, Jan/B-8814-2017 Gorbunov, Denis/G-7443-2014 Henriques, Margarida/G-6804-2014 Andreev, Alexander/B-6057-2011 Pereira Goncalves, Antonio/B-2849-2008 Baranov, Nikolai/J-5042-2013 Eigner, Vaclav/G-5812-2014
ORCID-Numbers	Prokleska, Jan/0000-0003-3246-5112 Pereira Goncalves, Antonio/0000-0003-2640-3038 Baranov, Nikolai/0000-0002-9720-5314 Paukov, Mykhaylo/0000-0002-6632-1339
Funding-Acknowledgement	program of Czech Research Infrastructures {[}LM2011025]; Czech Science Foundation {[}P204/12/0150, 14-03276S]; Czech Academy of Sciences {[}M10010203]; European Commission through the Access Activities of the Integrated Infrastructure Initiative forNeutron Scattering and Muon Spectroscopy {[}NMI3]; European Commission {[}NMI3-II/FP7 283883]; HLD; European Magnetic Field Laboratory (EMFL); CharlesUniversity {[}SVV2014-260091, GAUK-703912]; Portuguese Foundation for Science and Technology {[}SFRH/BD/66161/2009]
Funding-Text	The work was performed in MLTL (http://mltl. eu/), which is supported within the program of Czech Research Infrastructures (Project No. LM2011025). It was supported by Czech Science Foundation (Grants No. P204/12/0150 and No. 14-03276S) and Czech Academy of Sciences (Project No. M10010203). The neutron diffraction experiment at LLB was supported by the European Commission through the Access Activities of the Integrated Infrastructure Initiative forNeutron Scattering and Muon Spectroscopy (NMI3), supported by the European Commission under the 7th Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures, Contract No. NMI3-II/FP7 283883. We acknowledge the support of HLD at HZDR, member of the European Magnetic Field Laboratory (EMFL). D. I. G. also acknowledges CharlesUniversity GrantsNo. SVV2014-260091 and No. GAUK-703912. M. S. H. acknowledges the support of the Portuguese Foundation for Science and Technology through Grant No. SFRH/BD/66161/2009.
Number-of-Cited-References	53
Usage-Count-Last-180-days	5
Usage-Count-Since-2013	66
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	AO3VE