Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Galatanu, A.; Haga, Yoshinori; Matsuda, Tatsuma; Ikeda, Shugo; Yamamoto, Etsuji; Aoki, Dai*; Takeuchi, Tetsuya*; Onuki, Yoshichika
Journal of the Physical Society of Japan, 74(5), p.1582 - 1597, 2005/05
Times Cited Count:39 Percentile:79.83(Physics, Multidisciplinary)We investigated the magnetic property of typical uranium compounds by measuring the magnetic susceptibility in an extended temperature range up to about 800 K. The magnetic susceptibility follows the Curie-Weiss law for a localized 5-electron compound UPd
and a ferromagnetic insulator UFe
P
. In most of the investigated compounds we observed a crossover effect of the 5
electrons from a low-temperature itinerant nature to a high-temperature localized one. This is found to be characteristic for ferromagnetic superconductors such as UGe
and UIr, and also for antiferromagnets like USb
or UNiSb
. To assess an extension of this characteristic property in the uranium compounds we also investigated typical 5
-itinerant compounds like UGa
and UPtGa
. The crossover effect is essentially important in heavy fermion compounds such as UPt
, UPd
Al
and URu
Si
. Even in the paramagnetic compound of UB
, the magnetic susceptibility is not temperature-independent, but approaches a 5
-localized tendency at high temperatures. Since the samples were single crystals, we were also able to trace the evolution of the magnetic anisotropy. The high-temperature anisotropic susceptibility data were analyzed on the basis of the crystalline electric field scheme.