@phdthesis{oai:muroran-it.repo.nii.ac.jp:00005067,
 author = {関根,  ちひろ and SEKINE, Chihiro},
 month = {2016-02-15},
 note = {application/pdf, Paramagnetic heavy-fermion compound CeRu_2Si_2 shows a number of unusual magnetic properties due to the competition between the Kondo fluctuation and the antiferromagnetic correlation. One of the remarkable features at low temperature is the metamagnetic non-linear magnetization process. Although several models for the metamagnetism in CeRu_2Si_2 have been proposed so far，full explanation of this phenomenon has not been established yet. However the experiments of high pressure: and substituting La，Y for Ce in CeRu_2Si_2 show that this metamagnetism is strongly related to Kondo effect. In this paper， magnetic susceptibility， magnetization and specific heat measurements and μSR experiments have been performed on Ce(Ru_1-x>T_x)_2Si_2 (T = Rh(4d^7 5s^1)，Mo(4d^7 5s^1)，Pd (4d^7 5s^1)) in the Ru (4d^7 5s^1) rich region(O<_ _ -x<O.5) with a special interest in the small T substitution effects on the Kondo effect，the antiferromagnetic (AF) correlation and the metamagnetic transition in CeRu_2Si_2. The present study clearly demonstrates that the small T doping has a significant effect on the magnetic fluctuations in CeRu_2Si_2 Then we obtain new information as follows. (1) The shift of Kondo temperature and metamagnetic transition field in this system was opposite to what is expected from the simple volume effect discussed about substitution for Ce site so far. This result suggests that c-f hybridization of the system is rather sensitive to the d-electron number. In these solid solutions，the change in the d-electron number is overwhelming the volume effect. (2) At low Rh and Pd concentration，a weak AF ordering appears respectively. The nature of the ordering seems to be， however， not so simple. First of all，the ordered moment is small. We consider that in the weak AF ordering state the local fluctuation still plays a role. Further μSR measurement indicates the existence of complicated magnetic ordering as SDW in Rh doped system. This point is in contrast with the La doped system where the AF long range order with rather localized character is observed. (3) For Rh doped system metamagnetic transition clearly exists in the AF ordered samples，where another transition is observed in field at H_C below the metamagnetic transition field H_M. This is interpreted as follow; the AF ordering is destroyed above H_C and the system further undergoes a metamagnetic transition at H_M. Coexistence of antiferrmagnetism and metamagnetism has not been reported yet. Thus，a study in further detail of this system is significant in order to make clear metamagnetism.},
 school = {室蘭工業大学, Muroran Institute of Technology},
 title = {重い電子系Ce(Ru，T)2Si2の磁性における遷移金属T置換効果},
 year = {},
 yomi = {セキネ, チヒロ}
}