Density of states information from low temperature specific heat measurements
1970; The National Institute of Standards and Technology; Volume: 74A; Issue: 3 Linguagem: Inglês
10.6028/jres.074a.035
ISSN2376-5704
Autores Tópico(s)Advanced Thermodynamics and Statistical Mechanics
ResumoTh e c a lc ul a ti on of one -e lec tron d e ns it y of s tate va lues from th e coeffi cien t y of th e te rm of th e low te mpe rature s pec ifi c heat lin ea r in te mpe rature is co mpli cated by ma ny-body e ffects.In parti c ul a r , th e elec tron -p honon inte ra ction may enhan ce the meas ure d y as mu c h as tw ofo ld.Th e e nha nce me nt fa c to r ca n be eva luat e d in th e case of s upe rco ndu c tin g me ta ls a nd a ll oys.In th e prese nce of magne ti c moments, add it ional co mpli ca ti ons arise.A magne ti c co ntributi on to th e meas ure d y was id e ntifi e d in the case of dilute a ll oys and a lso of co nce ntrated a lJ oys wh e re parasiti c a ntife rroma gne tis m is s upe rimposed on a n ove r-a ll fe rromagne ti c orde r.No me thod has as ye t bee n de vised to e va lu a te thi s magne ti c part of y.T he se para ti on of th e te mp era ture-li nea r te rm of th e s pec ifi c heat may itse lf be co mpli ca te d by th e a pp ea ran ce of a s pecifi c heat a no ma ly du e to magneti c c luste rs in s upe rpa ramagneti c or we ak ly ferroma gne ti c a ll oys.
Referência(s)