Interface magnetic coupling and magnetization dynamic of La2/3Sr1/3MnO3 single layer and (La2/3Sr1/3MnO3/SrRuO3) <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si7.svg" display="inline" id="d1e184"> <mml:msub> <mml:mrow/> <mml:mrow> <mml:mi>n</mml:mi> </mml:mrow> </mml:msub> </mml:math> ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si8.svg" display="inline" id="d1e193"> <mml:mrow> <mml:mi>n</mml:mi> <mml:mo linebreak="goodbreak" linebreakstyle="after">=</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:math> , 5) superlattice on SrTiO3(001) substrate