Impurity effects on a 2-leg spin ladder compound SrCu2O3

M. Takano, M. Azuma, Y. Fujishiro, Minoru Nohara, H. Takagi, M. Fujiwara, H. Yasuoka, S. Ohsugi, Y. Kitaoka, R. S. Eccleston

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Abstract

Measurements of magnetic susceptibility, specific heat and inelastic neutron scattering were performed on a Zn-substituted spin-1/2 Heisenberg 2-leg ladder compound Sr(Cu1-xZnx)2O3 (x ≤ 0.08) to investigate nonmagnetic impurity effects on the quantum spin system with a large spin gap of about ∼ 400 K. A clear anomaly attributed to the onset of antiferromagnetic ordering was observed both in the magnetic susceptibility and specific heat data even at only 1 % of Zn. The Néel temperature showed a systematic Zn-concentration dependence with a broad maximum at around 4 % substitution (TNmax ∼ 8K). A finite amount of T-linear term with a coefficient of γ ∼ 3.5 mJ/K2 was observed in the specific heat above TN for x = 0.02 and 0.04, suggesting the existence of a finite density of states at E = 0 in the spin excitation spectrum as supported by the inelastic neutron scattering measurement.

Original languageEnglish
Pages (from-to)149-152
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume282-287
Issue numberPART 1
Publication statusPublished - Aug 1997
Externally publishedYes

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Ladders
ladders
Specific heat
Inelastic neutron scattering
Impurities
Magnetic susceptibility
impurities
specific heat
inelastic scattering
neutron scattering
magnetic permeability
Substitution reactions
substitutes
anomalies
heat
coefficients
excitation
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Takano, M., Azuma, M., Fujishiro, Y., Nohara, M., Takagi, H., Fujiwara, M., ... Eccleston, R. S. (1997). Impurity effects on a 2-leg spin ladder compound SrCu2O3. Physica C: Superconductivity and its Applications, 282-287(PART 1), 149-152.

Impurity effects on a 2-leg spin ladder compound SrCu2O3. / Takano, M.; Azuma, M.; Fujishiro, Y.; Nohara, Minoru; Takagi, H.; Fujiwara, M.; Yasuoka, H.; Ohsugi, S.; Kitaoka, Y.; Eccleston, R. S.

In: Physica C: Superconductivity and its Applications, Vol. 282-287, No. PART 1, 08.1997, p. 149-152.

Research output: Contribution to journalArticle

Takano, M, Azuma, M, Fujishiro, Y, Nohara, M, Takagi, H, Fujiwara, M, Yasuoka, H, Ohsugi, S, Kitaoka, Y & Eccleston, RS 1997, 'Impurity effects on a 2-leg spin ladder compound SrCu2O3', Physica C: Superconductivity and its Applications, vol. 282-287, no. PART 1, pp. 149-152.
Takano M, Azuma M, Fujishiro Y, Nohara M, Takagi H, Fujiwara M et al. Impurity effects on a 2-leg spin ladder compound SrCu2O3. Physica C: Superconductivity and its Applications. 1997 Aug;282-287(PART 1):149-152.
Takano, M. ; Azuma, M. ; Fujishiro, Y. ; Nohara, Minoru ; Takagi, H. ; Fujiwara, M. ; Yasuoka, H. ; Ohsugi, S. ; Kitaoka, Y. ; Eccleston, R. S. / Impurity effects on a 2-leg spin ladder compound SrCu2O3. In: Physica C: Superconductivity and its Applications. 1997 ; Vol. 282-287, No. PART 1. pp. 149-152.
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