Single-crystal study of U(Co1-xTx)Al compounds for T = Fe and Ni

B. Janoušová; A. V. Andreev; J. Šebek; Y. Homma; Y. Shiokawa; V. Sechovský

doi:10.1016/S0921-4526(01)01274-1

Single-crystal study of U(Co_1-xT_x)Al compounds for T = Fe and Ni

B. Janoušová, A. V. Andreev, J. Šebek, Y. Homma, Y. Shiokawa, V. Sechovský

Materials Processing and Characterization Division

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

4 Citations (Scopus)

Abstract

UCoAl has a paramagnetic ground state, although the c-axis susceptibility shows a maximum at T_max≈20 K. The low-T state is easily destabilized in a c-axis magnetic field or by doping by suitable elements. We report on first magnetization and specific-heat study of U(Co_0.95T_0.05)Al single crystals for T = Fe and Ni in fields up to 10 T. In both cases we confirmed the strong uniaxial anisotropy typical also for UCoAl. The Ni substitution yields a considerable increase of B_c whereas UCo_0.95Fe_0.05Al is ferromagnetic below 30 K. A detailed analysis of specific-heat data for UCoAl and UCo_0.95Ni_0.05Al in 0 and 10 T allows extracting entropy contributions due to spin fluctuations.

Original language	English
Pages (from-to)	888-890
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	312-313
DOIs	https://doi.org/10.1016/S0921-4526(01)01274-1
Publication status	Published - 2002 Mar
Event	International Conference on Strongly Correlated Electrons - Ann Arbor, MI, United States Duration: 2002 Aug 6 → 2002 Aug 6

Keywords

Metamagnetism
Spin fluctuations
UCoAl

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4526(01)01274-1

Cite this

@article{007cd35693584c908dc80e65da172555,

title = "Single-crystal study of U(Co1-xTx)Al compounds for T = Fe and Ni",

abstract = "UCoAl has a paramagnetic ground state, although the c-axis susceptibility shows a maximum at Tmax≈20 K. The low-T state is easily destabilized in a c-axis magnetic field or by doping by suitable elements. We report on first magnetization and specific-heat study of U(Co0.95T0.05)Al single crystals for T = Fe and Ni in fields up to 10 T. In both cases we confirmed the strong uniaxial anisotropy typical also for UCoAl. The Ni substitution yields a considerable increase of Bc whereas UCo0.95Fe0.05Al is ferromagnetic below 30 K. A detailed analysis of specific-heat data for UCoAl and UCo0.95Ni0.05Al in 0 and 10 T allows extracting entropy contributions due to spin fluctuations.",

keywords = "Metamagnetism, Spin fluctuations, UCoAl",

author = "B. Janou{\v s}ov{\'a} and Andreev, {A. V.} and J. {\v S}ebek and Y. Homma and Y. Shiokawa and V. Sechovsk{\'y}",

note = "Funding Information: This research was supported by the Ministry of Education of the Czech Republic (project # MSM113200002) and the Grant Agency of the Czech Republic (Grant # 202/99/0184).; International Conference on Strongly Correlated Electrons ; Conference date: 06-08-2002 Through 06-08-2002",

year = "2002",

month = mar,

doi = "10.1016/S0921-4526(01)01274-1",

language = "English",

volume = "312-313",

pages = "888--890",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

T1 - Single-crystal study of U(Co1-xTx)Al compounds for T = Fe and Ni

AU - Janoušová, B.

AU - Andreev, A. V.

AU - Šebek, J.

AU - Homma, Y.

AU - Shiokawa, Y.

AU - Sechovský, V.

N1 - Funding Information: This research was supported by the Ministry of Education of the Czech Republic (project # MSM113200002) and the Grant Agency of the Czech Republic (Grant # 202/99/0184).

PY - 2002/3

Y1 - 2002/3

N2 - UCoAl has a paramagnetic ground state, although the c-axis susceptibility shows a maximum at Tmax≈20 K. The low-T state is easily destabilized in a c-axis magnetic field or by doping by suitable elements. We report on first magnetization and specific-heat study of U(Co0.95T0.05)Al single crystals for T = Fe and Ni in fields up to 10 T. In both cases we confirmed the strong uniaxial anisotropy typical also for UCoAl. The Ni substitution yields a considerable increase of Bc whereas UCo0.95Fe0.05Al is ferromagnetic below 30 K. A detailed analysis of specific-heat data for UCoAl and UCo0.95Ni0.05Al in 0 and 10 T allows extracting entropy contributions due to spin fluctuations.

AB - UCoAl has a paramagnetic ground state, although the c-axis susceptibility shows a maximum at Tmax≈20 K. The low-T state is easily destabilized in a c-axis magnetic field or by doping by suitable elements. We report on first magnetization and specific-heat study of U(Co0.95T0.05)Al single crystals for T = Fe and Ni in fields up to 10 T. In both cases we confirmed the strong uniaxial anisotropy typical also for UCoAl. The Ni substitution yields a considerable increase of Bc whereas UCo0.95Fe0.05Al is ferromagnetic below 30 K. A detailed analysis of specific-heat data for UCoAl and UCo0.95Ni0.05Al in 0 and 10 T allows extracting entropy contributions due to spin fluctuations.

KW - Metamagnetism

KW - Spin fluctuations

KW - UCoAl

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U2 - 10.1016/S0921-4526(01)01274-1

DO - 10.1016/S0921-4526(01)01274-1

M3 - Conference article

AN - SCOPUS:0036504265

SN - 0921-4526

VL - 312-313

SP - 888

EP - 890

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - International Conference on Strongly Correlated Electrons

Y2 - 6 August 2002 through 6 August 2002

ER -