TY - JOUR
T1 - Magnetic correlations reflected by anomalies in transport and elastic properties of uranium intermetallics
AU - Sechovský, V.
AU - Honda, F.
AU - Janoušová, B.
AU - Prokeš, K.
AU - Svoboda, P.
AU - Syshchenko, O.
AU - Andreev, A. V.
N1 - Funding Information:
This work is a part of the research program MSM113200002 that is financed by the Ministry of Education of the Czech Republic. It has also been supported by the Grant Agency of the Czech Republic (grant # 202/02/ 0943).
PY - 2003/4
Y1 - 2003/4
N2 - We discuss anomalies in temperature dependences of the electrical resistivity ρ(T) and thermal-expansion ΔL/L(T) observed for UTX compounds (T = transition metal, X = p-electron element) in paramagnetic range. We shall concentrate on the antiferromagnets UNiAl and UNiGa and the itinerant 5f-electron metamagnet UCoAl. The ρ(T) and ΔL/L(T) anomalies are usually strongly anisotropic and survive far above the Néel temperature or a characteristic temperature T* (UCoAl) but can be removed in a high magnetic field applied along the easy-magnetization direction (c-axis). In some cases, the available specific-heat data allow to calculate the entropy change ΔS connected with applying a high magnetic field along the c-axis. The ΔS values also show a maximum above TN (UNiAl, UNiGa) or T* (UCoAl) and then slowly decay with increasing temperatures. A possible scenario for these phenomena presented here, is based on existence of antiferromagnetic (AF) correlations and/or short-range AF ordering surviving in paramagnetic range.
AB - We discuss anomalies in temperature dependences of the electrical resistivity ρ(T) and thermal-expansion ΔL/L(T) observed for UTX compounds (T = transition metal, X = p-electron element) in paramagnetic range. We shall concentrate on the antiferromagnets UNiAl and UNiGa and the itinerant 5f-electron metamagnet UCoAl. The ρ(T) and ΔL/L(T) anomalies are usually strongly anisotropic and survive far above the Néel temperature or a characteristic temperature T* (UCoAl) but can be removed in a high magnetic field applied along the easy-magnetization direction (c-axis). In some cases, the available specific-heat data allow to calculate the entropy change ΔS connected with applying a high magnetic field along the c-axis. The ΔS values also show a maximum above TN (UNiAl, UNiGa) or T* (UCoAl) and then slowly decay with increasing temperatures. A possible scenario for these phenomena presented here, is based on existence of antiferromagnetic (AF) correlations and/or short-range AF ordering surviving in paramagnetic range.
UR - http://www.scopus.com/inward/record.url?scp=0037399715&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037399715&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(02)01817-3
DO - 10.1016/S0921-4526(02)01817-3
M3 - Conference article
AN - SCOPUS:0037399715
SN - 0921-4526
VL - 328
SP - 95
EP - 99
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-2
T2 - T2PAM
Y2 - 16 August 2002 through 19 August 2002
ER -