Quantum paraelectric glass state in SrCu{sub 3}Ti{sub 4}O{sub 12}

Journal Article · Mon Jun 30 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4885643· OSTI ID:22303901

Kumar, Jitender; Choudhary, Ram Janay

Magnetic and dielectric studies of SrCu{sub 3}Ti{sub 4}O{sub 12} carried out over 5–300 K confirm antiferromagnetic (AFM) ordering of Cu-spins at T{sub N} = 23 K. Dielectric constant ε′ measured across 1 Hz-1 MHz signifies quantum paraelectric character, Barrett-fittable almost down to T{sub N}. Competition of athermal fluctuations and the literature-reported magneto-phonon-softening near T{sub N} manifest a quantum paraelectric glass (QPG) state. Emergent AFM-field tunes the otherwise quantum ordering (at absolute-zero) of the dipoles to finite-temperature kinetic glass transition; spectral dispersion of dielectric constant was unambiguously manifested and characterized. Vogel-Fulcher glass-kinetics parameterization sets the almost relaxation-free QPG state in SrCu{sub 3}Ti{sub 4}O{sub 12} apart from an emergent scaling-class, to which typical ferroelectric relaxors belong.

• OSTI ID: 22303901
• Journal Information: Applied Physics Letters, Vol. 104, Issue 26; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
ATOMIC FORCE MICROSCOPY
COPPER COMPOUNDS
DIPOLES
DISPERSIONS
FERROELECTRIC MATERIALS
FLUCTUATIONS
GLASS
NEEL TEMPERATURE
OXYGEN COMPOUNDS
PARAELECTRIC RESONANCE
PERMITTIVITY
PHONONS
RELAXATION
SPIN
SPIN GLASS STATE
STRONTIUM COMPOUNDS
TITANIUM COMPOUNDS