The influence of magnetic inhomogeneous state on thermopower and magnetothermopower in Sm0.55Sro.45MnO3 manganitesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 мая 2015 г.
Аннотация:Thermopower alfa and magnetothermopower delta alfa/alfa were studied in the the single-crystal Sm0.55Sr0.45MnO30samples, containing clusters of three types: ferromagnetic clusters with the Curie temperature T_C = 134 K, A-type antiferromagnetic clusters with the Neel temperature T_NA >= T_C and CE-type antiferromagnetic clusters with the T_NCE = 240 K. The curves of temperature dependence of alfa(T) and {delta alfa/alfa}(T) have extremum in the T_NCE-region: large maximum on the first and sharp minimum on the second. Negative magnetothermopower in minimum achieves the giant value 50%in magnetic field 13.2 kOe. It is shown that thermopower is essentialy caused by the presence of CE-type antiferromagnetic clusers, in which take place charge order displacing oxygen ions.