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Publications (14)

cond-mat.mtrl-sci2010

Epitaxial growth of multiferroic Pb(Zr0.57Ti0.43)O3-Pb(Fe2/3W1/3)O3 solid-solution thin films and their magnetoelectric effects

D. Lee, Y. -A. Park, S. M. Yang +5

We report on epitaxial growth of single-phase [Pb(Zr0.57Ti0.43)O3]0.8[Pb(Fe2/3W1/3)O3]0.2 (PZT-PFW) solid-solution thin films using pulsed laser deposition. X-ray diffraction measu…

cond-mat.mtrl-sci2005

Inhomogeneous level splitting in Pr $_{2 - x}$ Bi $_{x}$ Ru $_{2}$ O $_{7}$

J. van Duijn, K. H. Kim, N. Hur +7

We report that Bi doping drives Pr $_{x}$ Bi $_{2 - x}$ Ru $_{2}$ O $_{7}$ from an antiferromagnetic insulator ( $x = 2$ ) to a metallic paramagnet ( $x \approx 1$ ) with a broad low $T$ maximum in $C/T…

cond-mat.str-el2014

Quadrupolar Singlet Ground State of Praseodymium in a Modulated Pyrochlore

J. van Duijn, K. H. Kim, N. Hur +12

The complex structure and magnetism of Pr $_{2 - x}$ Bi $_{x}$ Ru $_{2}$ O $_{7}$ was investigated by neutron scattering and EXAFS. Pr has an approximate doublet ground-state and the first excite…

cond-mat.str-el2005

Spin structure and magnetic frustration in multiferroic RMn2O5 (R = Tb, Ho, Dy)

G. R. Blake, L. C. Chapon, P. G. Radaelli +4

We have studied the crystal and magnetic structures of the magnetoelectric materials RMn2O5 (R = Tb, Ho, Dy) using neutron diffraction as a function of temperature. All three mater…

cond-mat.str-el2022

Magnetic excitations in double perovskite iridates La $_{2}$ $M$ IrO $_{6}$ ( $M$ = Co, Ni, and Zn) mediated by 3 $d$ -5 $d$ hybridization

Wentao Jin, Sae Hwan Chun, Jungho Kim +6

By performing resonant inelastic x-ray scattering (RIXS) measurements at the Ir $L_{3}$ edge, we have investigated the low-energy elementary excitations in a seri…

cond-mat.str-el2003

Exchange interaction effects on the optical properties of LuMnO3

A. B. Souchkov, J. R. Simpson, H. D. Drew +6

We have measured the optical conductivity of single crystal LuMnO3 from 10 to 45000 cm-1 at temperatures between 4 and 300 K. A symmetry allowed on-site Mn $d$ - $d$ transition near…

cond-mat.mtrl-sci2016

Local structural distortion induced by antiferromagnetic ordering in Bi $_{2}$ Fe $_{4}$ O $_{9}$ studied using neutron total scattering analysis

I. -K. Jeong, N. Hur

To unravel the origin of the dielectric anomaly at the antiferromagnetic ordering of magnetoelectric Bi $_{2}$ Fe $_{4}$ O $_{9}$ we performed neutron powder diffraction measurements across t…

cond-mat.str-el2009

Quasi-particle scattering and protected nature of topological states in a parent topological insulator Bi $_{2}$ Se $_{3}$

S. R. Park, W. S. Jung, Chul Kim +5

We report on angle resolved photoemission spectroscopic studies on a parent topological insulator (TI), Bi $_{2}$ Se $_{3}$ . The line width of the spectral function (inverse of the quasi-…

cond-mat.stat-mech2007

Heat Capacity in Magnetic and Electric Fields Near the Ferroelectric Transition in Tri-Glycine Sulfate

J. C. Lashley, C. P. Opeil, T. R. Finlayson +5

Specific-heat measurements are reported near the Curie temperature ( $T_{C}$ ~= 320 K) on tri-glycine sulfate. Measurements were made on crystals whose surfaces were either non-grounde…

cond-mat.mtrl-sci2013

Spin-Chiral Bulk Fermi Surfaces of BiTeI Proven by Quantum Oscillations

Joonbum Park, E. Kampert, Kyung-Hwan Jin +10

We present the Fermi-surface map of the spin-chiral bulk states for the non-centrosymmetric semiconductor BiTeI using de Haas-van Alphen and Shubnikov-de Haas oscillations. We iden…

cond-mat.str-el2008

Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature

N. Hur, I. K. Jeong, M. F. Hundley +2

We present a unique example of giant magnetoelectric effect in a conventional multiferroic HoMnO3, where polarization is very large (~56 mC/m2) and the ferroelectric transition tem…

cond-mat.mtrl-sci2003

Temperature-induced barium de-trapping from a double-well potential in Ba6Ge25

M. Schmidt, P. G. Radaelli, M. J. Gutmann +3

The crystal structure of barium-germanium clathrate Ba6Ge25 was studied using neutron powder diffraction in the temperature range 20-300K. The compound was found to be cubic (S.G.…

cond-mat.mtrl-sci2008

Magnetic exchange interaction between rare-earth and Mn ions in multiferroic hexagonal manganites

D. Talbayev, A. D. LaForge, S. A. Trugman +4

We report a study of magnetic dynamics in multiferroic hexagonal manganite HoMnO3 by far-infrared spectroscopy. Low-temperature magnetic excitation spectrum of HoMnO3 consists of m…

cond-mat.str-el2007

J. van Duijn, N. Hur, J. W. Taylor +5

Spin correlations in the pyrochlore antiferromagnet Y_2Ru_2O_7 with Curie-Weiss temperature $I^_{C W} = - 1100$ K and critical temperature T_N=77 K were examined through neutron scatte…