, ▁becoming ▁a ▁senior ▁chem ist ▁in ▁ 2 0 0 1 . ▁She ▁was ▁also ▁an ▁adj unct ▁professor ▁at ▁the ▁University ▁of ▁Notre ▁D ame ▁from ▁ 2 0 0 3 ▁until ▁ 2 0 0 7 . ▁ ▁Career ▁and ▁Research ▁ ▁Un cover ing ▁structure ▁of ▁Y tt rium - 1 2 3 ▁Super con duct or ▁ ▁Early ▁in ▁her ▁career , ▁S oder holm ▁focused ▁on ▁the ▁character izing ▁the ▁magnetic ▁and ▁electronic ▁behavior ▁of ▁comp ounds ▁containing ▁f - ions ▁( lan than ides ▁and ▁act in ides ) ▁with ▁a ▁focus ▁on ▁high - T c ▁materials , ▁comp ounds ▁that ▁are ▁super con duct ing ▁under ▁usually ▁high ▁temper atures . ▁She ▁was ▁part ▁of ▁the ▁research ▁group ▁that ▁first ▁determined ▁the ▁structure ▁of ▁Y B a 2 C u 3 O 7 . ▁Their ▁discovery ▁formed ▁the ▁foundation ▁for ▁the ▁further ▁develop ments ▁in ▁the ▁broad ▁field ▁of ▁super con duct ivity . ▁ ▁Under standing ▁f - ion ▁spe ci ation ▁in ▁solution ▁▁▁ ▁Cont inu ing ▁her ▁interest ▁in ▁the ▁f - elements , ▁S oder holm ▁shift ed ▁her ▁focus ▁from ▁solid - state ▁materials ▁to ▁nan op articles ▁and ▁solutions , ▁taking ▁advantage ▁of ▁adv ances ▁in ▁X - ray ▁struct ural ▁prob es ▁made ▁available ▁by ▁syn ch ro tr on ▁facilities . ▁Building ▁on ▁her ▁earlier ▁work ▁using ▁neut ron ▁scatter ing , ▁her ▁ ▁team ▁became ▁the ▁first ▁to ▁discover ▁that ▁plut on ium ▁exists ▁in