Unusual nature of electronic and magnetic states of Sm1.85Ce0.15CuO4-δ

B. K. Cho, Jae Hoon Kim, Young Jin Kim, O. Beom-hoan, J. S. Kim, G. R. Stewart

Research output: Contribution to journalArticle

Abstract

Temperature-dependent magnetization (M(T)) and specific heat (CP(T)) measurements were carried out on single-crystal Sm1.85Ce0.15CuO4-δ (TC=16.5K). The magnetic anisotropy in the static susceptibility, x = M/H, is apparent not only in its magnitude but also in its temperature dependence, with Χ for H ⊥ c larger than Χ for H ∥ c. For both field orientations, Χ does not follow the Curie-Weiss behavior due to the small energy gap of the J = 7/2 multiplet above the J = 5/2 ground-state multiplet. However, with increasing temperature, Χ(T) exhibits a broad minimum near 100 K and then a slow increase while Χ(T) shows a monotonic decrease. A sharp peak in CP(T) at 4.7 K manifests an antiferromagnetic ordering. The electronic contribution, 7, to CP(T) is estimated to be γ = 103.2 (7) mJ/mole·Sm·K2. The entropy associated with the magnetic ordering is much smaller than Rln2, where R is the gas constant, which is usually expected for the doublet ground state of Sm+3. The unusual magnetic and electronic properties evident in M(T) and CP(T) are probably due to a strong anisotropic interaction between conduction electrons and localized electrons at Sm+3 sites.

Original languageEnglish
Pages (from-to)491-492
Number of pages2
JournalPhysica C: Superconductivity and its Applications
Volume341-348
Issue numberPART 1
DOIs
Publication statusPublished - 2000 Jan 1

Fingerprint

Magnetization
fine structure
magnetization
Ground state
ground state
electronics
conduction electrons
Electrons
Magnetic anisotropy
specific heat
entropy
magnetic properties
magnetic permeability
Electronic properties
Temperature
temperature dependence
anisotropy
Specific heat
temperature
single crystals

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Cho, B. K. ; Kim, Jae Hoon ; Kim, Young Jin ; Beom-hoan, O. ; Kim, J. S. ; Stewart, G. R. / Unusual nature of electronic and magnetic states of Sm1.85Ce0.15CuO4-δ. In: Physica C: Superconductivity and its Applications. 2000 ; Vol. 341-348, No. PART 1. pp. 491-492.
@article{5923139d17224c07b1833b2cc4cc5047,
title = "Unusual nature of electronic and magnetic states of Sm1.85Ce0.15CuO4-δ",
abstract = "Temperature-dependent magnetization (M(T)) and specific heat (CP(T)) measurements were carried out on single-crystal Sm1.85Ce0.15CuO4-δ (TC=16.5K). The magnetic anisotropy in the static susceptibility, x = M/H, is apparent not only in its magnitude but also in its temperature dependence, with Χ⊥ for H ⊥ c larger than Χ∥ for H ∥ c. For both field orientations, Χ does not follow the Curie-Weiss behavior due to the small energy gap of the J = 7/2 multiplet above the J = 5/2 ground-state multiplet. However, with increasing temperature, Χ∥(T) exhibits a broad minimum near 100 K and then a slow increase while Χ⊥(T) shows a monotonic decrease. A sharp peak in CP(T) at 4.7 K manifests an antiferromagnetic ordering. The electronic contribution, 7, to CP(T) is estimated to be γ = 103.2 (7) mJ/mole·Sm·K2. The entropy associated with the magnetic ordering is much smaller than Rln2, where R is the gas constant, which is usually expected for the doublet ground state of Sm+3. The unusual magnetic and electronic properties evident in M(T) and CP(T) are probably due to a strong anisotropic interaction between conduction electrons and localized electrons at Sm+3 sites.",
author = "Cho, {B. K.} and Kim, {Jae Hoon} and Kim, {Young Jin} and O. Beom-hoan and Kim, {J. S.} and Stewart, {G. R.}",
year = "2000",
month = "1",
day = "1",
doi = "10.1016/S0921-4534(00)00557-8",
language = "English",
volume = "341-348",
pages = "491--492",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "PART 1",

}

Unusual nature of electronic and magnetic states of Sm1.85Ce0.15CuO4-δ. / Cho, B. K.; Kim, Jae Hoon; Kim, Young Jin; Beom-hoan, O.; Kim, J. S.; Stewart, G. R.

In: Physica C: Superconductivity and its Applications, Vol. 341-348, No. PART 1, 01.01.2000, p. 491-492.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unusual nature of electronic and magnetic states of Sm1.85Ce0.15CuO4-δ

AU - Cho, B. K.

AU - Kim, Jae Hoon

AU - Kim, Young Jin

AU - Beom-hoan, O.

AU - Kim, J. S.

AU - Stewart, G. R.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - Temperature-dependent magnetization (M(T)) and specific heat (CP(T)) measurements were carried out on single-crystal Sm1.85Ce0.15CuO4-δ (TC=16.5K). The magnetic anisotropy in the static susceptibility, x = M/H, is apparent not only in its magnitude but also in its temperature dependence, with Χ⊥ for H ⊥ c larger than Χ∥ for H ∥ c. For both field orientations, Χ does not follow the Curie-Weiss behavior due to the small energy gap of the J = 7/2 multiplet above the J = 5/2 ground-state multiplet. However, with increasing temperature, Χ∥(T) exhibits a broad minimum near 100 K and then a slow increase while Χ⊥(T) shows a monotonic decrease. A sharp peak in CP(T) at 4.7 K manifests an antiferromagnetic ordering. The electronic contribution, 7, to CP(T) is estimated to be γ = 103.2 (7) mJ/mole·Sm·K2. The entropy associated with the magnetic ordering is much smaller than Rln2, where R is the gas constant, which is usually expected for the doublet ground state of Sm+3. The unusual magnetic and electronic properties evident in M(T) and CP(T) are probably due to a strong anisotropic interaction between conduction electrons and localized electrons at Sm+3 sites.

AB - Temperature-dependent magnetization (M(T)) and specific heat (CP(T)) measurements were carried out on single-crystal Sm1.85Ce0.15CuO4-δ (TC=16.5K). The magnetic anisotropy in the static susceptibility, x = M/H, is apparent not only in its magnitude but also in its temperature dependence, with Χ⊥ for H ⊥ c larger than Χ∥ for H ∥ c. For both field orientations, Χ does not follow the Curie-Weiss behavior due to the small energy gap of the J = 7/2 multiplet above the J = 5/2 ground-state multiplet. However, with increasing temperature, Χ∥(T) exhibits a broad minimum near 100 K and then a slow increase while Χ⊥(T) shows a monotonic decrease. A sharp peak in CP(T) at 4.7 K manifests an antiferromagnetic ordering. The electronic contribution, 7, to CP(T) is estimated to be γ = 103.2 (7) mJ/mole·Sm·K2. The entropy associated with the magnetic ordering is much smaller than Rln2, where R is the gas constant, which is usually expected for the doublet ground state of Sm+3. The unusual magnetic and electronic properties evident in M(T) and CP(T) are probably due to a strong anisotropic interaction between conduction electrons and localized electrons at Sm+3 sites.

UR - http://www.scopus.com/inward/record.url?scp=0343397643&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0343397643&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(00)00557-8

DO - 10.1016/S0921-4534(00)00557-8

M3 - Article

AN - SCOPUS:0343397643

VL - 341-348

SP - 491

EP - 492

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - PART 1

ER -