Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4

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

Research output: Contribution to journalArticle

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Abstract

Temperature-dependent magnetization [M(T)] and specific heat [Cp(T)] measurements were carried out on single crystal Sm1.85Ce0.15CuO4-δ (Tc=16.5 K). The magnetic anisotropy in the static susceptibility χ ≡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. With increasing temperature, however, 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, γ, 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 R In 2, 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
Article number214504
Pages (from-to)2145041-2145045
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number21
Publication statusPublished - 2001 Aug 20

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

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Cho, B. K., Jae Hoon Kim, H. K., Young Jin Kim, J. K., Beom-hoan, O., Kim, J. S., & Stewart, G. R. (2001). Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4. Physical Review B - Condensed Matter and Materials Physics, 63(21), 2145041-2145045. [214504].
Cho, B. K. ; Jae Hoon Kim, Hoon Kim ; Young Jin Kim, Jin Kim ; Beom-hoan, O. ; Kim, J. S. ; Stewart, G. R. / Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4. In: Physical Review B - Condensed Matter and Materials Physics. 2001 ; Vol. 63, No. 21. pp. 2145041-2145045.
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abstract = "Temperature-dependent magnetization [M(T)] and specific heat [Cp(T)] measurements were carried out on single crystal Sm1.85Ce0.15CuO4-δ (Tc=16.5 K). The magnetic anisotropy in the static susceptibility χ ≡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. With increasing temperature, however, 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, γ, 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 R In 2, 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.",
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Cho, BK, Jae Hoon Kim, HK, Young Jin Kim, JK, Beom-hoan, O, Kim, JS & Stewart, GR 2001, 'Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4', Physical Review B - Condensed Matter and Materials Physics, vol. 63, no. 21, 214504, pp. 2145041-2145045.

Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4-δ. / Cho, B. K.; Jae Hoon Kim, Hoon Kim; Young Jin Kim, Jin Kim; Beom-hoan, O.; Kim, J. S.; Stewart, G. R.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 63, No. 21, 214504, 20.08.2001, p. 2145041-2145045.

Research output: Contribution to journalArticle

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T1 - Electronic and magnetic properties of the electron-doped superconductor Sm1.85Ce0.15CuO4-δ

AU - Cho, B. K.

AU - Jae Hoon Kim, Hoon Kim

AU - Young Jin Kim, Jin Kim

AU - Beom-hoan, O.

AU - Kim, J. S.

AU - Stewart, G. R.

PY - 2001/8/20

Y1 - 2001/8/20

N2 - Temperature-dependent magnetization [M(T)] and specific heat [Cp(T)] measurements were carried out on single crystal Sm1.85Ce0.15CuO4-δ (Tc=16.5 K). The magnetic anisotropy in the static susceptibility χ ≡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. With increasing temperature, however, 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, γ, 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 R In 2, 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=16.5 K). The magnetic anisotropy in the static susceptibility χ ≡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. With increasing temperature, however, 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, γ, 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 R In 2, 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.

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M3 - Article

AN - SCOPUS:0034902795

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