Magnetic phase diagram of the ferromagnetic Kondo-lattice compound CeAgSb2 up to 80 kbar -: art. no. 224419

被引:90
作者
Sidorov, VA
Bauer, ED
Frederick, NA
Jeffries, JR
Nakatsuji, S
Moreno, NO
Thompson, JD
Maple, MB
Fisk, Z
机构
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[3] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA
[4] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
[5] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA
关键词
D O I
10.1103/PhysRevB.67.224419
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Electrical resistivity and ac-calorimetric measurements reveal a complex magnetic phase diagram for single crystals of the ferromagnetic Kondo-lattice compound CeAgSb2 at high pressures up to 80 kbar. The ferromagnetic order at T-C=9.6 K at ambient pressure is completely suppressed at a critical pressure P-C=35 kbar. Another magnetic transition, possibly antiferromagnetic, found above 27 kbar, attains a maximum value T(N)similar to6 K at 44 kbar and then appears to be completely suppressed by similar to50 kbar. Thermodynamic and transport measurements in the ferromagnetic state indicate an energy gap Deltasimilar to30 K in the spin-wave excitation spectrum at ambient pressure which decreases to Deltasimilar to10 K at P=30 kbar. No superconductivity is observed at ambient pressure above Tsimilar to0.1 K, under applied pressure in the ferromagnetic state (P=28.5 kbar), nor in the antiferromagnetic state (P=33-46 kbar) above 0.3 K.
引用
收藏
页数:9
相关论文
共 44 条
  • [1] Adroja D T, UNPUB
  • [2] ADROJA DT, CONDMAT0206505
  • [3] Andersen N.Hessel., 1980, Crystalline Electric Field and Structural Effects in f -Electron Systems, P373
  • [4] Magnetic structures of RAgSb2 compounds
    André, G
    Bourée, F
    Kolenda, M
    Lesniewska, B
    Oles, A
    Szytula, A
    [J]. PHYSICA B, 2000, 292 (1-2): : 176 - 189
  • [5] Coexistence of superconductivity and ferromagnetism in URhGe
    Aoki, D
    Huxley, A
    Ressouche, E
    Braithwaite, D
    Flouquet, J
    Brison, JP
    Lhotel, E
    Paulsen, C
    [J]. NATURE, 2001, 413 (6856) : 613 - 616
  • [6] Coexistence of superconductivity and ferromagnetism in polycrystalline UGe2
    Bauer, ED
    Dickey, RP
    Zapf, VS
    Maple, MB
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (33) : L759 - L770
  • [7] Fluctuation-driven quantum phase transitions in clean itinerant ferromagnets
    Belitz, D
    Kirkpatrick, TR
    [J]. PHYSICAL REVIEW LETTERS, 2002, 89 (24) : 247202 - 247202
  • [8] A DIAMOND ANVIL CELL FOR THE INVESTIGATION OF SUPERCONDUCTIVITY UNDER PRESSURES OF UP TO 50 GPA - PB AS A LOW-TEMPERATURE MANOMETER
    BIRECKOVEN, B
    WITTIG, J
    [J]. JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, 1988, 21 (09): : 841 - 848
  • [9] Calorimetric investigation of CeRu2Ge2 up to 8 GPa
    Bouquet, F
    Wang, Y
    Wilhelm, H
    Jaccard, D
    Junod, A
    [J]. SOLID STATE COMMUNICATIONS, 2000, 113 (07) : 367 - 371
  • [10] SPECIFIC-HEAT MEASUREMENTS OF PRESSURE-INDUCED REENTRANT SUPERCONDUCTIVITY IN EU0.9HO0.1MO6S8
    CHEN, X
    PEREL, AS
    BROOKS, JS
    GUERTIN, RP
    HINKS, DG
    [J]. JOURNAL OF APPLIED PHYSICS, 1993, 73 (04) : 1886 - 1891