Premium
Thickness‐Dependent Ru Exchange Spring at La 0.7 Sr 0.3 MnO 3 –SrRuO 3 Interface
Author(s) -
Koch Martin M.,
Bergmann Lukas,
Agrestini Stefano,
Maznichenko Igor,
Mertig Ingrid,
Herklotz Andreas,
Das Sujit,
Rata Diana A.,
Dörr Kathrin
Publication year - 2020
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201900616
Subject(s) - magnetic circular dichroism , condensed matter physics , ferromagnetism , spins , materials science , zeeman effect , magnetization , spring (device) , exchange bias , oxide , magnetic field , magnetic anisotropy , physics , metallurgy , thermodynamics , quantum mechanics , astronomy , spectral line
The conducting oxide ferromagnets SrRuO 3 (SRO) and La 0.7 Sr 0.3 MnO 3 (LSMO) form a Ru exchange spring at a coherent low‐interdiffusion interface grown on TiO 2 ‐terminated SrTiO 3 (STO)(001) substrates as SRO( d )/LSMO/STO(001) bilayers. Field‐ and temperature‐dependent magnetization data with systematically varied thickness d of SRO from 7 to 18 unit cells (uc) indicate a thickness of 10–14 uc of the exchange spring which governs magnetic switching and causes thickness‐dependent field‐cooling effects. Mn L 3 edge X‐ray magnetic circular dichroism (XMCD) data reveal the dominating in‐plane orientation of interfacial spins. In low magnetic fields, noncoplanar, topologically nontrivial spin textures arise and can be switched, driven by the Zeeman energy of the LSMO layer.