Evidence of quadrupolar transitions in the circular dichroism at the neodymium <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> and <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>L</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> edges

Jesús Chaboy; Fernando Bartolomé; Luis M. García; Giannantonio Cibin

doi:10.1103/PhysRevB.57.R5598

Rapid Communication

Evidence of quadrupolar transitions in the circular dichroism at the neodymium $L_{2}$ and $L_{3}$ edges

Jesús Chaboy, Fernando Bartolomé, Luis M. García, and Giannantonio Cibin

Phys. Rev. B 57, R5598(R) – Published 1 March 1998

Abstract

The temperature dependence of the x-ray magnetic circular dichroism (XMCD) at both the Nd $L_{2}$ and $L_{3}$ edges in ${Nd}_{2} {Fe}_{14} B$ has been studied to ascertain the multipolar nature of the features in the dichroic spectra below the absorption edges. As this compound exhibits a spin reorientation transition at low temperatures, XMCD reflects the modification of the angle between the photon wave vector and the magnetization direction as a function of temperature. The angular dependence of the features below both the $L_{2}$ and $L_{3}$ absorption edges is determined to correspond to that proposed for quadrupolar transitions.