Magnetization and Magnetoresistance of CeRu2Al10 under High Magnetic Fields along c-Axis - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Magnetization and Magnetoresistance of CeRu2Al10 under High Magnetic Fields along c-Axis - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: We have studied the magnetization and magnetoresistance of CeRu2Al10 in theapplied magnetic field H along the c-axis up to ~ 55 T. The magnetization M atlow temperatures shows an H-linear increase with a small slope of M-H than thatfor H - a-axis up to ~ 55 T after showing a small anomaly at H ~ 4 T, whichindicates that the critical field to the paramagnetic phase H c^p is higherthan 55 T for H - c-axis. The magnetization curves for H - a- and c-axesbelow the antiferro magnetic AFM transition temperature T0 behave as if themagnetic anisotropy in the AFM-ordered phase is small, although there exists alarge magnetic anisotropy in the paramagnetic phase, which favors the easymagnetization axis along the a-axis. On the other hand, very recently,Khalyavin et al. have reported that the AFM order where the magnetic moment isparallel to the c-axis takes place below T0. These results indicate that theAFM order in this compound is not a simple one. The longitudinalmagnetoresistance for H - c-axis at low temperatures shows no anomalyoriginating from the phase transition, but shows oscillations below 4.2 K. Thisoscillatory behavior below 4.2 K originates from the Shubnikov-de Haasoscillations, from which the cross section of the Fermi surface normal to thec-axis is estimated to be 1.0*10^14 cm-2, with no large effective mass. This isthe first direct evidence of the existence of the Fermi surface below T0.



Author: Akihiro Kondo, Junfeng Wang, Koichi Kindo, Tomoaki Takesaka, Yuta Ogane, Yukihiro Kawamura, Takashi Nishioka, Daiki Tanaka, Hiros

Source: https://arxiv.org/



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