Exchange bias driven by the structural/magnetic transition in Mn-doped SrRuO3
PBN-AR
Instytucja
Instytut Fizyki Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
CERAMICS INTERNATIONAL
ISSN
0272-8842
EISSN
Wydawca
ELSEVIER SCI LTD
DOI
URL
Rok publikacji
2016
Numer zeszytu
7
Strony od-do
8453–8459
Numer tomu
42
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
en
Exchange bias Phase transition Ruthenates
Streszczenia
Język
en
Treść
Magnetic properties of bulk polycrystalline Mn-doped SrRu(1-x)MnxO(3) perovskite, at doping range 0.2 <= x <= 0.3, were studied by both magnetization and ac-susceptibility measurements. It was found that the exchange bias (EB) effect emerges with increasing Mn doping in SrRu(1-x)MnxO(3) at x approximate to 0.25, following the ferromagnetic (FM) to antiferromagnetic (AFM) phase transition. This transition is accompanied with the change in structure symmetry and then the EB field, H-EB, increases significantly in doping range 0.25 < x <= 0.3. The EB effect was verified by both cooling magnetic field, H-cool, dependence of the H-EB and training effect. A markedly nonmonotonic H-EB vs. H-cool dependence with maximum at around 40 kOe was found, resembling the behavior of phase-separated EB systems. Moreover, a clear analogy with behavior of classic EB system of Pr1/3Ca2/3MnO3 was noticed, strongly suggesting that the EB effect in SrRu1-xMnxO3 originates from exchange interactions at the interface of nanoscale FM clusters (size of similar to 1.6 nm at x=0.3) coexisting together with dominant AFM phase at the boundary of the first-order FM/AFM transition. The training effect observed is well understandable within the spin-configuration relaxation model and indicates important contribution to the EB behavior from the AFM domains rearrangement at the interface. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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Original article
Original article presents the results of original research or experiment.
Inne
System-identifier
PBN-R:730045
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