Thermal expansion of single-crystalline UNiAl

被引:11
作者
Prokes, K
deVisser, A
Menovsky, AA
Bruck, E
deBoer, FR
Sechovsky, V
Gortenmulder, TJ
机构
[1] CHARLES UNIV,DEPT MET PHYS,CR-12116 PRAGUE 2,CZECH REPUBLIC
[2] LEIDEN UNIV,KAMERLINGH ONNES LAB,2300 RA LEIDEN,NETHERLANDS
关键词
D O I
10.1063/1.361999
中图分类号
O59 [应用物理学];
学科分类号
摘要
Magnetization, magnetic susceptibility, electrical resistivity, and specific heat measurements of UNiAl point to antiferromagnetic ordering below 19.3 K, which is confirmed by neutron-diffraction experiments. The enhanced gamma value of 167 mJ/mol K-2 is reflecting pronounced presence of magnetic fluctuations, which influence also the other electronic properties down to low temperatures. The thermal expansion of UNiAl was measured in the temperature range 1.5-210 K on a single crystal along the a and c axis. Similar to other bulk properties, also the thermal expansion of UNiAl is highly anisotropic. The a axis is monotonously expanding with increasing temperature in the whole temperature range. Along the c axis, the lattice first collapses with increasing temperature up to 35 K. Around this temperature, the thermal expansion coefficient alpha(c) changes sign and continuous expansion with further increasing temperature is then observed. The sharp anomaly of a near 19.3 K present in both directions is consistent with the magnetic phase transition. The results are discussed in terms of the presence of anisotropic magnetic fluctuations. (C) 1996 American Institute of Physics.
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页码:6358 / 6360
页数:3
相关论文
共 7 条
[1]   ELECTRONIC-PROPERTIES OF UNIAL IN HIGH MAGNETIC-FIELDS [J].
BRUCK, E ;
NAKOTTE, H ;
DEBOER, FR ;
DECHATEL, PF ;
VANDERMEULEN, HP ;
FRANSE, JJM ;
MENOVSKY, AA ;
KIMNGAN, NH ;
HAVELA, L ;
SECHOVSKY, V ;
PERENBOOM, JAAJ ;
TUAN, NC ;
SEBEK, J .
PHYSICAL REVIEW B, 1994, 49 (13) :8852-8863
[2]  
CUONG TD, IN PRESS J MAGN MAGN
[3]   MAGNETO-VOLUME EFFECTS IN SOME SELECTED HEAVY-FERMION COMPOUNDS [J].
DEVISSER, A ;
FRANSE, JJM ;
FLOUQUET, J .
PHYSICA B, 1989, 161 (1-3) :324-332
[4]   UPT3, HEAVY FERMIONS AND SUPERCONDUCTIVITY [J].
DEVISSER, A ;
MENOVSKY, A ;
FRANSE, JJM .
PHYSICA B & C, 1987, 147 (01) :81-160
[5]  
PROKES K, IN PRESS
[6]  
SECHOVSKY V, 1988, FERROMAGNETIC MATERI, V4, pCH4
[7]  
VANDIJK NH, 1994, THESIS U AMSTERDAM