203 citations · 1.1k across the 15 of their papers we have counts for
15 papers
Spin correlations and cobalt charge states: A new phase diagram of sodium cobaltates
G. Lang, J. Bobroff, H. Alloul +2
Using 23Na NMR measurements on sodium cobaltates at intermediate dopings (0.44<=x<=0.62), we establish the qualitative change of behavior of the local magnetic susceptibility at x*…
Na atomic order, Co charge disproportionation and magnetism in NaCoO for large Na contents
H. Alloul, I. R. Mukhamedshin, G. Collin +1
We have synthesized and characterized four different stable phases of Na ordered NaCoO, for . Above 100 K they display similar Curie-Weiss susceptibilities…
NMR study of the magnetic and metal-insulator transitions in Na0.5CoO2: a nesting scenario
J. Bobroff, G. Lang, H. Alloul +2
Co and Na NMR are used to probe the local susceptibility and charge state of the two Co sites of the Na-ordered orthorhombic Na0.5CoO2. Above T_N=86K, both sites display a similar…
Evidence of a single nonmagnetic Co3+ state in the Na1CoO2 cobaltate
G. Lang, J. Bobroff, H. Alloul +3
Macroscopic magnetization, muon spin rotation (muSR), and NMR measurements were carried out to study magnetism in the Na1CoO2 cobaltate. Using SQUID measurements, Na1CoO2 is shown…
Planar 17O NMR study of Pr_yY_{1-y}Ba_2Cu_3O_{6+x}
W. A. MacFarlane, J. Bobroff, P. Mendels +5
We report the planar ^{17}O NMR shift in Pr substituted YBa_{2}Cu_{3}O_{6+x}, which at x=1 exhibits a characteristic pseudogap temperature dependence, confirming that Pr reduces th…
Susceptibility and dilution effects of the kagome bi-layer geometrically frustrated network. A Ga-NMR study of SrCr_(9p)Ga_(12-9p)O_(19)
L. Limot, P. Mendels, G. Collin +5
We present an extensive gallium NMR study of the geometrically frustrated kagome bi-layer compound SrCr_(9p)Ga_(12-9p)O_(19) (Cr^3+, S=3/2) over a broad Cr-concentration range (.72…