Study on anomalous Hall resistivity of Nd2Mo2-xTixO7

Kageyama, T Iikubo, S Yoshii, S Kondo, Y Sato, M Iye, Y

T. Kageyama et al., Study on anomalous Hall resistivity of Nd2Mo2-xTixO7, J PHYS JPN, 70(10), 2001, pp. 3006-3010

14

INGLESE

Article

Physics

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN

0031-9015 → ACNP

70

10

2001

3006 - 3010

ISI

0031-9015(200110)70:10<3006:SOAHRO>2.0.ZU;2-F

Hall resistivity PH has been studied for single crystals of Nd2Mo2O7, which has the ferromagnetic and chiral ordered state. Effects of Ti-doping on PH have also been studied down to 3 K under the magnetic field (H) up to 7 T. The T- and H-regions of the measurements have boon extended for non-doped samples to 50 mK and 15 T, respectively. From the results, it has been conf irmed that two components of the anomalous Hall resistivity exist. One. is proportional to tho net magnetization of Mo atoms, M-Mo. It changes its sig n with the doping. The other is proportional to the net magnetization of Nd atoms, M-Nd and does not exhibit the sign change. The Hall resistivity has a finite and almost T-independent value at very low temperatures. The,,,(, results on the behavior of rho (H) are discussed by considering the existi ng theories including the one recently proposed by a mechanism related to t he spin chiral order.