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: 1
Последняя страница: 5
Номер статьи: 116075
DOI: 10.1016/j.ssc.2025.116075
Аннотация: Heavy fermion compound Ce3Pd20Si6 (CPS) is known mainly due to the study of quantum criticality in a localmoment system, since antiferromagnetic (AFM) phase transition is fully suppressed by magnetic field. Here we report galvanomagnetic properties [electrical resistivity, transverse magnetoresistance (TMR)] of Ce3Pd20Si6 and its non-magnetic counterpart La3Pd20Si6 (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 playssignificant 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: Грибанов Александр Викторович

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Inverse isosbestic point in transverse magnetoresistance of Ce3Pd20Si6 heavy fermion systemстатья Исследовательская статья

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