TY - JOUR
T1 - Anomalous Nernst effects in pyrochlore molybdates with spin chirality
AU - Hanasaki, N.
AU - Sano, K.
AU - Onose, Yoshinori
AU - Ohtsuka, T.
AU - Iguchi, Satoshi
AU - Kézsmárki, I.
AU - Miyasaka, S.
AU - Onoda, S.
AU - Nagaosa, N.
AU - Tokura, Y.
PY - 2008/3/12
Y1 - 2008/3/12
N2 - The transverse thermoelectric (Nernst) effect on pyrochlore molybdates is investigated experimentally. In Nd2Mo2O7 and Sm2Mo2O7 with the spin chirality, the Nernst signal, which mostly arises from the transverse heat current (or equivalently the transverse Peltier coefficient αxy), shows a low-temperature (20-30 K) positive extremum, whereas it is absent in (Gd0.95Ca0.05)2Mo2O7 with no single-spin anisotropy of the rare-earth ion and hence with no spin chirality. The correlation between the Hall conductivity σxy and αxy in Nd2Mo2O7 also indicates the spin chirality plays a significant role in the spontaneous (anomalous) Nernst effect.
AB - The transverse thermoelectric (Nernst) effect on pyrochlore molybdates is investigated experimentally. In Nd2Mo2O7 and Sm2Mo2O7 with the spin chirality, the Nernst signal, which mostly arises from the transverse heat current (or equivalently the transverse Peltier coefficient αxy), shows a low-temperature (20-30 K) positive extremum, whereas it is absent in (Gd0.95Ca0.05)2Mo2O7 with no single-spin anisotropy of the rare-earth ion and hence with no spin chirality. The correlation between the Hall conductivity σxy and αxy in Nd2Mo2O7 also indicates the spin chirality plays a significant role in the spontaneous (anomalous) Nernst effect.
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U2 - 10.1103/PhysRevLett.100.106601
DO - 10.1103/PhysRevLett.100.106601
M3 - Article
AN - SCOPUS:40849088053
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 106601
ER -