Ultrasonic study of Kondo compounds Cexla1-xB6 (0.60 ≤ x ≤ 0.75)

O. Suzuki; T. Goto; S. Nakamura; S. Kunii

doi:10.1016/S0921-4526(99)01126-6

Ultrasonic study of Kondo compounds Ce_xla_1-xB₆ (0.60 ≤ x ≤ 0.75)

O. Suzuki, T. Goto, S. Nakamura, S. Kunii

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Conference article › peer-review

Abstract

We have performed the ultrasonic measurements to examine systematic change of the magnetic-phase diagrams of the Kondo compound Ce_xLa_1-xB₆ with the Γ₈ ground state as a function of cerium concentration x. A long-range ordered phase IV is observed in addition to an antiferroquadrupolar phase II and an antiferromagnetic phase III in the compounds of x = 0.75, 0.70 and 0.65. The huge softenings of C₄₄ in phase IV indicate considerable enhancement of the quadrupolar fluctuation with Γ₅ symmetry. With decreasing cerium concentration x, the ground state of Ce_xLa_1-xB₆ at low temperatures under low-magnetic fields changes from the ordered phase IV to a non-magnetic state due to the Kondo effect in vicinity of x ∼ 0.60.

Original language	English
Pages (from-to)	563-565
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	281-282
DOIs	https://doi.org/10.1016/S0921-4526(99)01126-6
Publication status	Published - 2000
Event	Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Japan Duration: 1999 Aug 24 → 1999 Aug 28

Keywords

(Ce,La)B
Elastic constants
Quadrupolar effect

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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@article{bcbd75f8116c4640bb7a52da845cea03,

title = "Ultrasonic study of Kondo compounds Cexla1-xB6 (0.60 ≤ x ≤ 0.75)",

abstract = "We have performed the ultrasonic measurements to examine systematic change of the magnetic-phase diagrams of the Kondo compound CexLa1-xB6 with the Γ8 ground state as a function of cerium concentration x. A long-range ordered phase IV is observed in addition to an antiferroquadrupolar phase II and an antiferromagnetic phase III in the compounds of x = 0.75, 0.70 and 0.65. The huge softenings of C44 in phase IV indicate considerable enhancement of the quadrupolar fluctuation with Γ5 symmetry. With decreasing cerium concentration x, the ground state of CexLa1-xB6 at low temperatures under low-magnetic fields changes from the ordered phase IV to a non-magnetic state due to the Kondo effect in vicinity of x ∼ 0.60.",

keywords = "(Ce,La)B, Elastic constants, Quadrupolar effect",

author = "O. Suzuki and T. Goto and S. Nakamura and S. Kunii",

note = "Funding Information: This work was partly supported by Grant-in-Aid from the Ministry of Education, Science, Sports and Culture of Japan.; Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) ; Conference date: 24-08-1999 Through 28-08-1999",

year = "2000",

doi = "10.1016/S0921-4526(99)01126-6",

language = "English",

volume = "281-282",

pages = "563--565",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

T1 - Ultrasonic study of Kondo compounds Cexla1-xB6 (0.60 ≤ x ≤ 0.75)

AU - Suzuki, O.

AU - Goto, T.

AU - Nakamura, S.

AU - Kunii, S.

N1 - Funding Information: This work was partly supported by Grant-in-Aid from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2000

Y1 - 2000

N2 - We have performed the ultrasonic measurements to examine systematic change of the magnetic-phase diagrams of the Kondo compound CexLa1-xB6 with the Γ8 ground state as a function of cerium concentration x. A long-range ordered phase IV is observed in addition to an antiferroquadrupolar phase II and an antiferromagnetic phase III in the compounds of x = 0.75, 0.70 and 0.65. The huge softenings of C44 in phase IV indicate considerable enhancement of the quadrupolar fluctuation with Γ5 symmetry. With decreasing cerium concentration x, the ground state of CexLa1-xB6 at low temperatures under low-magnetic fields changes from the ordered phase IV to a non-magnetic state due to the Kondo effect in vicinity of x ∼ 0.60.

AB - We have performed the ultrasonic measurements to examine systematic change of the magnetic-phase diagrams of the Kondo compound CexLa1-xB6 with the Γ8 ground state as a function of cerium concentration x. A long-range ordered phase IV is observed in addition to an antiferroquadrupolar phase II and an antiferromagnetic phase III in the compounds of x = 0.75, 0.70 and 0.65. The huge softenings of C44 in phase IV indicate considerable enhancement of the quadrupolar fluctuation with Γ5 symmetry. With decreasing cerium concentration x, the ground state of CexLa1-xB6 at low temperatures under low-magnetic fields changes from the ordered phase IV to a non-magnetic state due to the Kondo effect in vicinity of x ∼ 0.60.

KW - (Ce,La)B

KW - Elastic constants

KW - Quadrupolar effect

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U2 - 10.1016/S0921-4526(99)01126-6

DO - 10.1016/S0921-4526(99)01126-6

M3 - Conference article

AN - SCOPUS:0033904283

VL - 281-282

SP - 563

EP - 565

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

T2 - Yamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99)

Y2 - 24 August 1999 through 28 August 1999

ER -