MAGNETIC, THERMAL, AND TRANSPORT-PROPERTIES OF UIR2SI2

被引：19

作者：

DIRKMAAT, AJ ^{[1
]}

ENDSTRA, T ^{[1
]}

KNETSCH, EA ^{[1
]}

NIEUWENHUYS, GJ ^{[1
]}

MYDOSH, JA ^{[1
]}

MENOVSKY, AA ^{[1
]}

DEBOER, FR ^{[1
]}

TARNAWSKI, Z ^{[1
]}

机构：

[1] UNIV AMSTERDAM,NATUURKUNDIG LAB,1000 HE AMSTERDAM,NETHERLANDS

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.41.2589

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetization, resistivity, and specific-heat measurements have been performed on a high-quality single crystal of (tetragonal) UIr2Si2. In all physical quantities anomalies are found related to an antiferromagnetic transition at TN+4.9 K. No superconductivity was observed down to 40 mK. The magnetization and resistivity are strongly anisotropic. Below 4.9 K a metamagnetic transition occurs along the c axis at a field of 2.2 T. For T>TN the specific heat yields an electronic constant of 105 mJ/mol K2, whereas below TN a much higher value (290 mJ/mol K2) is found. The magnetic entropy related to the transition is too small to be explained by an ordering of localized moments. A crystal-electric-field level scheme involving three singlets and a doublet is used in an attempt to interpret the data, but clearly effects of the heavy electrons and their hybridization must be considered. © 1990 The American Physical Society.

引用

页码：2589 / 2592

页数：4

共 25 条

[1]

BRODSKY MB, 1977, PHYSICA B & C, V86, P143, DOI 10.1016/0378-4363(77)90262-5

[2]

BRODSKY MB, 1978, J PHYS-PARIS, V39, P777

[3] QUADRUPOLAR KONDO EFFECT IN URANIUM HEAVY-ELECTRON MATERIALS [J].

COX, DL .

PHYSICAL REVIEW LETTERS, 1987, 59 (11) :1240-1243

[4] THE QUADRUPOLAR KONDO EFFECT - A NEW MECHANISM FOR HEAVY ELECTRONS [J].

COX, DL .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 76-7 :53-58

[5] HIGH-MAGNETIC-FIELD AND HIGH-PRESSURE EFFECTS IN MONOCRYSTALLINE URU2SI2 [J].

DEBOER, FR ;

FRANSE, JJM ;

LOUIS, E ;

MENOVSKY, AA ;

MYDOSH, JA ;

PALSTRA, TTM ;

RAUCHSCHWALBE, U ;

SCHLABITZ, W ;

STEGLICH, F ;

DEVISSER, A .

PHYSICA B & C, 1986, 138 (1-2) :1-6

[6] SPECIFIC-HEAT OF THE DEGENERATE KONDO MODEL - EXACT RESULTS IN THE PRESENCE OF CRYSTAL FIELDS [J].

DESGRANGES, HU ;

RASUL, JW .

PHYSICAL REVIEW B, 1987, 36 (01) :328-340

[7] MAGNETIC AND TRANSPORT-PROPERTIES OF UT2GE2 (T=3D ELEMENT) INTERMETALLIC COMPOUNDS [J].

DIRKMAAT, AJ ;

ENDSTRA, T ;

KNETSCH, E ;

MENOVSKY, AA ;

MYDOSH, JA .

JOURNAL DE PHYSIQUE, 1988, 49 (C-8) :475-476

[8]

DIRKMAAT AJ, IN PRESS EUROPHYS LE

[9]

DIRKMAAT AJ, IN PRESS J MAGN MAGN

[10]

DIRKMAAT AJ, 1989, THESIS LEIDEN U NETH

← 1 2 3 →