Open AccessAnomalous thermal conductivity in Nd＿1.67Sr0.33NiO＿4
Author(s) -
Gao Hui-Ping,
Bo Li,
Yu Yong,
Keqing Ruan,
Wu Bai-Mei
Publication year - 2004
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.53.3853
Subject(s) - thermal conductivity , condensed matter physics , phonon , materials science , perovskite (structure) , electrical resistivity and conductivity , conductivity , spin (aerodynamics) , thermal , physics , thermodynamics , crystallography , chemistry , composite material , quantum mechanics
The temperature dependence of thermal conductivity (K),resistivity (ρ) and low field ac susceptibility (χ) of perovskite nick elates Nd2-xSrxNiO4(x =0.33,1.35) have been measured at temperatures from 77 to 300 K. The thermal conductivity an omalies associated with charge_order (CO) and spin_order (SO) are observed simultaneously in Nd1.67Sr0.33NiO4 for the firs t time so far as we know. The thermal conductivity is enhanced belowT_CO , but is suppressed near TSO. There is also response to CO and S O in the χ-Τ curve. Only CO is observed in the ρ-Τ curve. In contrast, th ere are no anomalies in K-Τ, ρ-Τ andχ-Τ of Nd1.67Sr0.33NiO4. The anomalous phonon thermal conductivi ty in Nd1.67Sr0.33NiO4 indicates that there are strong charg e_phonon interaction and the spin_phonon interaction in this compound.