Title
Unconventional phase diagram for six heavy rare earth metals showing melting plus magnetic transitions versus the de Gennes factor Unconventional phase diagram for six heavy rare earth metals showing melting plus magnetic transitions versus the de Gennes factor
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Source (journal)
Physics and chemistry of liquids. - London
Volume/pages
52(2014) :5 , p. 650-656
ISSN
0031-9104
ISI
000341446800007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Melting temperatures T-m of six heavy rare earth metals are well established experimentally. Here, a close correlation is displayed between these values T-m and the de Gennes factor (xi below), which is proportional to the product of ( g - 1)(2) with total angular momentum values J ( J + 1). We thereby exhibit a tendency of a plot of T-m versus.xi(-1) to saturate at the largest., this corresponding to Gd of the six selected elements. Second, following Chikazumi's book, it is stressed that the N eel temperatures T-N of the remaining five metals display empirically a good linear correlation with xi(2/3). Finally, the monovacancy formation energy is briefly considered in relation to the thermal energy k(B)T(m), the ratio E-v/k(B)T(m) being of order 10 in other known cases.
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