Advantage of using nonlinear ellipse rotation effect to determine orientational nonlinearities: observation of an 2.25 enhancement factor - Souza, Tiago Gualberto Bezerra de; Barbano, Emerson Cristiano; Zílio, Sérgio Carlos; Misoguti, Lino (Encontro Nacional de Física da Matéria Condensada - ENFMC, 2017)