NDLI: 89Y NMR probe of Zn induced local magnetism in YBa2(Cu1-yZny) 3O6+x

Content Provider	Springer Nature Link
Author	Mahajan, A.V. Alloul, H. Collin, G. Marucco, J.F.
Copyright Year	2000
Abstract	We present detailed data and analysis of the effects of Zn substitution on the planar Cu site in YBa2Cu3O6+x (YBCO6+x) as evidenced from our 89Y NMR measurements on oriented powders. For $$x \ll 1$$ we find additional NMR lines which are associated with the Zn substitution. From our data on the intensities and temperature dependence of the shift, width, and spin-lattice relaxation rate of these resonances, we conclude that the spinless Zn 3d 10 state induces local moments on the near-neighbour (nn) Cu atoms. Additionally, we conjecture that the local moments actually extend to the farther Cu atoms with the magnetization alternating in sign at subsequent nn sites. We show that this analysis is compatible with ESR data taken on dilute Gd doped (on the Y site) and on neutron scattering data reported recently on Zn substituted YBCO6 + x. For optimally doped compounds 89Y nn resonances are not detected, but a large T-dependent contribution to the 89Y NMR linewidth is evidenced and is also attributed to the occurence of a weak induced local moment near the Zn. These results are compatible with macroscopic magnetic measurements performed on YBCO6 + x samples prepared specifically in order to minimize the content of impurity phases. We find significant differences between the present results on the underdoped YBCO6 + x samples and 27Al NMR data taken on Al3+ substituted on the Cu site in optimally doped La2CuO4. Further experimental work is needed to clarify the detailed evolution of the impurity induced magnetism with hole content in the cuprates.
Starting Page	457
Ending Page	475
Page Count	19
File Format	PDF
ISSN	14346028
Journal	The European Physical Journal B
Volume Number	13
Issue Number	3
e-ISSN	14346036
Language	English
Publisher	EDP Sciences
Publisher Date	2000-01-01
Publisher Place	Les Ulis
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condensed Matter Physics Physics Statistical Physics, Dynamical Systems and Complexity Fluid- and Aerodynamics Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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