Synthesis, structural and magnetic characterization of polycrystalline Yb{sub 2}Ti{sub 2}O{sub 7}

Journal Article · Wed Jun 24 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917699· OSTI ID:22490252

Juyal, Abhishek; Mukhopadhyay, Soumik; Barman, Kalyani ^[1]

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1. Department of Physics, Indian Institute of Technology Kanpur, KANPUR-208016 (India)

The discovery of the Yb{sub 2}Ti{sub 2}O{sub 7} is among the most significant findings in magnetic materials in over a decade. The spin-ice model is based on an ingenious analogy to Pauling’s model of geometrical frustration in water ice, which is confirmed by various experiments. Here we present the characteristics of Yb2Ti2O7 studied by X-ray diffraction and magnetic measurements. Polycrystalline sample of Yb{sub 2}Ti{sub 2}O{sub 7} was prepared by sol-gel synthesis followed by thermal annealing at 1400 ° C for 36 hours. We calculated the change in the magnetic entropy from isothermal magnetization curves. We find no evidence of plateau at Pauling residual entropy. Temperature dependence of the inverse magnetic susceptibility reveals Curie-Wiess temperature Θ{sub cw} = 156mK and paramagnetic moment μ{sub eff} ≈ 3.58 µ{sub B}, indicating weak ferromagnetic interaction. Using Arrott plot we conclude that Yb{sub 2}Ti{sub 2}O{sub 7} possibly enters a magnetic ground state below Tc~140 mK.

• OSTI ID: 22490252
• Journal Information: AIP Conference Proceedings, Vol. 1665, Issue 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNEALING
CURIE-WEISS LAW
ENTROPY
GROUND STATES
ICE
MAGNETIC MATERIALS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
PARAMAGNETISM
POLYCRYSTALS
SOL-GEL PROCESS
SPIN
SYNTHESIS
TEMPERATURE DEPENDENCE
TITANATES
WATER
X-RAY DIFFRACTION
YTTERBIUM COMPOUNDS