Inverse isosbestic point in transverse magnetoresistance of Ce3Pd20Si6 heavy fermion system

Anisimov, M.A.; Bogach, A.V.; Demishev, S.V.; Samarin, A.N.; Semeno, A.V.; Gribanova, S.V.; Dunaev, S.F.; Gribanov, A.V.

Авторы: Anisimov M.A., Bogach A.V., Demishev S.V., Samarin A.N., Semeno A.V., Gribanova S.V., Dunaev S.F., Gribanov A.V.
Журнал: Solid State Communications
Том: 404
Год издания: 2025
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 116075
DOI: 10.1016/j.ssc.2025.116075
Аннотация: Heavy fermion compound Ce3Pd20Si (CPS) is known mainly due to the study of quantum criticality in a local-moment system, since antiferromagnetic (AFM) phase transition is fully suppressed by magnetic field. Here we report galvanomagnetic properties [electrical resistivity, transverse magnetoresistance (TMR)] of Ce3Pd20Si and its non-magnetic counterpart La3Pd20Si (LPS). The experiment has been performed on polycrystals of high quality in the temperature range 1.8 - 300 K in magnetic fields up to 82 kOe. The obtained data allow us for the first time to register the isosbestic point (IP) at Tiso = 8 K, which is very close to the position of inversion point Tinv = 7.4 K, separating positive (T > Tinv) and negative (T < Tinv) regimes of TMR in CPS. The phenomenon when two characteristic temperatures of different nature practically coincide is very unusual, and they may be considered as one temperature scale (inverse isosbestic point). In our opinion Tiso/Tinv plays significant role, being the boundary of the formation of spin and orbital correlations in paramagnetic (PM) vicinity of so-called phase II in CPS.
Добавил в систему: Анисимов Михаил Александрович

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Inverse isosbestic point in transverse magnetoresistance of Ce3Pd20Si6 heavy fermion systemстатья