skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Specific features of magnetic order in a multiferroic compound CuCrO2 determined using NMR and NQR data for 63, 65Cu nuclei

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1377864
Report Number(s):
IS-J 9329
Journal ID: ISSN 0031-918X; PII: 192
DOE Contract Number:
DE-AC02-07CH11358
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Metals and Metallography; Journal Volume: 118; Journal Issue: 2
Country of Publication:
United States
Language:
English

Citation Formats

Smol’nikov, A. G., Ogloblichev, V. V., Verkhovskii, S. V., Mikhalev, K. N., Yakubovskii, A. Yu., Furukawa, Y., Piskunov, Yu. V., Sadykov, A. F., Barilo, S. N., and Shiryaev, S. V. Specific features of magnetic order in a multiferroic compound CuCrO2 determined using NMR and NQR data for 63, 65Cu nuclei. United States: N. p., 2017. Web. doi:10.1134/s0031918x17020120.
Smol’nikov, A. G., Ogloblichev, V. V., Verkhovskii, S. V., Mikhalev, K. N., Yakubovskii, A. Yu., Furukawa, Y., Piskunov, Yu. V., Sadykov, A. F., Barilo, S. N., & Shiryaev, S. V. Specific features of magnetic order in a multiferroic compound CuCrO2 determined using NMR and NQR data for 63, 65Cu nuclei. United States. doi:10.1134/s0031918x17020120.
Smol’nikov, A. G., Ogloblichev, V. V., Verkhovskii, S. V., Mikhalev, K. N., Yakubovskii, A. Yu., Furukawa, Y., Piskunov, Yu. V., Sadykov, A. F., Barilo, S. N., and Shiryaev, S. V. Wed . "Specific features of magnetic order in a multiferroic compound CuCrO2 determined using NMR and NQR data for 63, 65Cu nuclei". United States. doi:10.1134/s0031918x17020120.
@article{osti_1377864,
title = {Specific features of magnetic order in a multiferroic compound CuCrO2 determined using NMR and NQR data for 63, 65Cu nuclei},
author = {Smol’nikov, A. G. and Ogloblichev, V. V. and Verkhovskii, S. V. and Mikhalev, K. N. and Yakubovskii, A. Yu. and Furukawa, Y. and Piskunov, Yu. V. and Sadykov, A. F. and Barilo, S. N. and Shiryaev, S. V.},
abstractNote = {},
doi = {10.1134/s0031918x17020120},
journal = {Physics of Metals and Metallography},
number = 2,
volume = 118,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}
  • The authors carried out the extensive Cu-nuclear magnetic and quadrupole resonance (NMR/NQR) experiments on the Zn(Ni)-doped ladder compound SrCu{sub 2}O{sub 3} (Sr123), Sr(Cu{sub 1{minus}x}M{sub x}){sub 2}O{sub 3} (M = Zn and Ni) with x {le} 0.02 and the La-doped Sr123, Sr{sub 1{minus}x}La{sub x}Cu{sub 2}O{sub 3} with {alpha} {le} 0.03. A spin-correlation length {xi}{sub s}/a (a: the lattice spacing between the Cu sites along the leg) of nonmagnetic impurity-induced staggered polarization (IISP) estimated from a quasi-one-dimensional (Q1D) IISP along the two legs in the 0.1--2% Zn-doped Sr123 was found to be independent of temperature (T) and scaled to an mean impuritymore » distance D{sub AV} with the relation of {xi}{sub s}/a = 2.5 + D{sub AV}. The {xi}{sub s}/a's are much longer in x = 0.001 ({xi}{sub s}/a {approximately} 50) and 0.005 ({xi}{sub s}/a {approximately} 12) than an instantaneous spin-correlation length {xi}{sub 0}/a {approximately} 3--8 in Sr123. The formula of Neel T, T{sub N} (WC-Q1D) = J exp({minus}D{sub AV}/({xi}{sub s}/a)) (J = 2,000 K) based on the weakly interladder-coupled (WC) Q1D model explains the experimental T{sub N} values quantitatively.« less
  • Evidence is presented of superconducting fluctuations in the {sup 63}Cu NQR-NMR relaxation rate in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, as obtained from a careful comparison of measurements carried out in the absence and in the presence of a field parallel to the {ital c} axis. It is shown that the field causes a reduction of the relaxation rate {ital W} in a range of about 10 K above {ital T}{sub {ital c}}. This effect is related to the suppression by the magnetic field of the phase-sensitive positive Maki-Thompson contribution while the negative contribution from the DOS fluctuations is almost field independent.more » Furthermore, it is argued how the fluctuation effects on {ital W} can be used to discuss the pairing state symmetry, at variance with the insensitivity of the transport measurements. It is pointed out that the existence of the Maki-Thompson contribution to {ital W} evidences an {ital s}-wave symmetry component for the pairing in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. {copyright} {ital 1996 The American Physical Society.}« less
  • In this paper detailed neutron scattering measurements of the magnetic excitation spectrum of \CCO\ in the ordered state belowmore » $$T_{\rm{N1}}=24.2$$~K are presented. The spectra are analyzed using a model Hamiltonian which includes intralayer-exchange up to the next-next-nearest neighbor and interlayer-exchange. We obtain a definite parameter set and show that exchange interaction terms beyond the next-nearest neighbor are important to describe the inelastic excitation spectrum. The magnetic ground state structure generated with our parameter set is in agreement with the structure proposed for \CCO\ from the results of single crystal diffraction experiments previously published. We argue that the role of the interlayer exchange is crucial to understand the incommensurability of the magnetic structure as well as the spin-charge coupling mechanism.« less
  • The magnetic characteristics of LaCuO{sub 2.5} comprising an antiferromagnetic two-chain spin-1/2 ladder have been investigated by {sup 63}Cu NMR measurements. The ground state of this compound was suggested from susceptibility measurements to be the singlet-spin liquid state. The present experiments have, however, revealed that LaCuO{sub 2.5} is not in such a spin-liquid state, but rather a magnetic ordering takes place below {ital T}{sub {ital N}}{approximately} 110 K as evidenced by the large enhancement of the nuclear spin-lattice relaxation rate, (1/{ital T}{sub 1}) and of the spin-echo decay rate, 1/{ital T}{sub 2} leading to the disappearance of the Cu NMR signal.more » This magnetic ordered state has been found to be suppressed by substituting Sr for La by 5{percent}, i.e., by hole doping. {copyright} {ital 1996 The American Physical Society.}« less