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Title: Spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]] ([ital x]=0. 14, [ital y]=0. 012) (abstract)

Abstract

Magnetism of high-[ital T][sub [ital c]] superconductors is still the subject of intensive investigation. Zn substitution for Cu together with removal of oxygen suppresses the superconductivity quickly. We prepared two crystals to perform a neutron scattering study of the spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]]. One is a Zn-doped and deoxygenated crystal La[sub 1.86]Sr[sub 0.14]Cu[sub 0.988]Zn[sub 0.012]O[sub 4[minus][delta]] ([number sign]1) which does not show superconductivity above 1.5 K. The other is a Zn-doped crystal La[sub 1.86]Sr[sub 0.14]Cu[sub 0.988]Zn[sub 0.012]O[sub 4] ([number sign]2) which shows superconductivity below 16 K. The incommensurate spin excitations observed previously in superconducting samples[sup 1,2] containing no Zn remain in both samples. However, there is significant difference in the spectral weight [chi][double prime]([ital q],[omega]) at low temperatures between the non-superconducting and superconducting Zn-doped crystals. In crystal [number sign]1 the spectral weight at low temperatures is qualitatively similar to that of Zn-undoped non-superconducting samples.[sup 3] In crystal [number sign]2 the spectral weight at low temperatures is qualitatively similar to that of Zn-undoped superconducting samples.[sup 1,2] These results demonstrate that there is an intimate relationship between the magnetism and the superconductivity. We are in the process of further measurements.

Authors:
; ; ;  [1]; ;  [2]; ;  [3]; ;  [4]
  1. Department of Physics, Tohoku University, Sendai 980 (Japan)
  2. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
  3. Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  4. Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Kofu 400 (Japan)
Publication Date:
OSTI Identifier:
6669311
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics; (United States)
Additional Journal Information:
Journal Volume: 73:10; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER OXIDES; FLUCTUATIONS; MAGNETIC PROPERTIES; LANTHANUM OXIDES; STRONTIUM OXIDES; ZINC OXIDES; HIGH-TC SUPERCONDUCTORS; NEUTRON DIFFRACTION; SPIN; TEMPERATURE EFFECTS; ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; DIFFRACTION; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; STRONTIUM COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; VARIATIONS; ZINC COMPOUNDS; 360207* - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-)

Citation Formats

Matsuda, M, Kuroda, K, Yamada, K, Endoh, Y, Chou, H, Shirane, G, Birgeneau, R J, Kastner, M A, Tanaka, I, and Kojima, H. Spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]] ([ital x]=0. 14, [ital y]=0. 012) (abstract). United States: N. p., 1993. Web. doi:10.1063/1.352638.
Matsuda, M, Kuroda, K, Yamada, K, Endoh, Y, Chou, H, Shirane, G, Birgeneau, R J, Kastner, M A, Tanaka, I, & Kojima, H. Spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]] ([ital x]=0. 14, [ital y]=0. 012) (abstract). United States. doi:10.1063/1.352638.
Matsuda, M, Kuroda, K, Yamada, K, Endoh, Y, Chou, H, Shirane, G, Birgeneau, R J, Kastner, M A, Tanaka, I, and Kojima, H. Sat . "Spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]] ([ital x]=0. 14, [ital y]=0. 012) (abstract)". United States. doi:10.1063/1.352638.
@article{osti_6669311,
title = {Spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]] ([ital x]=0. 14, [ital y]=0. 012) (abstract)},
author = {Matsuda, M and Kuroda, K and Yamada, K and Endoh, Y and Chou, H and Shirane, G and Birgeneau, R J and Kastner, M A and Tanaka, I and Kojima, H},
abstractNote = {Magnetism of high-[ital T][sub [ital c]] superconductors is still the subject of intensive investigation. Zn substitution for Cu together with removal of oxygen suppresses the superconductivity quickly. We prepared two crystals to perform a neutron scattering study of the spin fluctuations of La[sub 2[minus][ital x]]Sr[sub [ital x]]Cu[sub 1[minus][ital y]]Zn[sub [ital y]]O[sub 4[minus][delta]]. One is a Zn-doped and deoxygenated crystal La[sub 1.86]Sr[sub 0.14]Cu[sub 0.988]Zn[sub 0.012]O[sub 4[minus][delta]] ([number sign]1) which does not show superconductivity above 1.5 K. The other is a Zn-doped crystal La[sub 1.86]Sr[sub 0.14]Cu[sub 0.988]Zn[sub 0.012]O[sub 4] ([number sign]2) which shows superconductivity below 16 K. The incommensurate spin excitations observed previously in superconducting samples[sup 1,2] containing no Zn remain in both samples. However, there is significant difference in the spectral weight [chi][double prime]([ital q],[omega]) at low temperatures between the non-superconducting and superconducting Zn-doped crystals. In crystal [number sign]1 the spectral weight at low temperatures is qualitatively similar to that of Zn-undoped non-superconducting samples.[sup 3] In crystal [number sign]2 the spectral weight at low temperatures is qualitatively similar to that of Zn-undoped superconducting samples.[sup 1,2] These results demonstrate that there is an intimate relationship between the magnetism and the superconductivity. We are in the process of further measurements.},
doi = {10.1063/1.352638},
journal = {Journal of Applied Physics; (United States)},
issn = {0021-8979},
number = ,
volume = 73:10,
place = {United States},
year = {1993},
month = {5}
}