TY - JOUR
T1 - Specific-heat study of the spin-structural change in pyrochlore Nd 2Mo2O7
AU - Onose, Y.
AU - Taguchi, Y.
AU - Ito, T.
AU - Tokura, Y.
N1 - Funding Information:
The authors thank N. Nagaosa, S. Onoda, H. Takagi, T. Arima, Y. Oohara, and H. Yoshizawa for enlightening discussions. The present work was in part supported by Grant-In-Aid for Scientific Research from the MEXT and by the NEDO.
PY - 2004/8
Y1 - 2004/8
N2 - By measurements of specific heat, we have investigated the magnetic field (H) induced spin-structural change in Nd2Mo2O7 that shows intriguing spin-chirality-related magnetotransport phenomena. With increasing H, a broad peak around 2 K caused by the ordering of 2-in 2-out structure of the Nd moments shifts to the lower temperature (T) up to around 3 T and then to the higher T above around 3 T irrespective of the H-direction. This is due to the crossover from antiferromagnetic to ferromagnetic arrangement between the Nd and Mo moments. While the peak T increases monotonically above 3 T for H∥11[100], another peak emerges around 0.9 K at 12 T for H∥[111], which is ascribed to the emergence of 3-in 1-out structure. For H∥[110], a spikelike peak is observed at around 3 T, which is caused perhaps by some spin flip transition.
AB - By measurements of specific heat, we have investigated the magnetic field (H) induced spin-structural change in Nd2Mo2O7 that shows intriguing spin-chirality-related magnetotransport phenomena. With increasing H, a broad peak around 2 K caused by the ordering of 2-in 2-out structure of the Nd moments shifts to the lower temperature (T) up to around 3 T and then to the higher T above around 3 T irrespective of the H-direction. This is due to the crossover from antiferromagnetic to ferromagnetic arrangement between the Nd and Mo moments. While the peak T increases monotonically above 3 T for H∥11[100], another peak emerges around 0.9 K at 12 T for H∥[111], which is ascribed to the emergence of 3-in 1-out structure. For H∥[110], a spikelike peak is observed at around 3 T, which is caused perhaps by some spin flip transition.
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U2 - 10.1103/PhysRevB.70.060401
DO - 10.1103/PhysRevB.70.060401
M3 - Article
AN - SCOPUS:42749105580
SN - 0163-1829
VL - 70
SP - 060401-1-060401-4
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 6
M1 - 060401
ER -