Spin-glass behavior in Ni-doped La1.85Sr0.15CuO4

Insulating and metallic spin glass in Ni-doped KxFe2− ySe2 single crystals

Hyejin Ryu ( ),1,2,* Milinda Abeykoon,1 Kefeng Wang ( ),1,† Hechang Lei ( ),1,‡ N. Lazarevic,3 J. B. Warren,4 E. S. Bozin,1 Z. V. Popovic,3 and C. Petrovic1,2 1Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA 2Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA 3Center for Solid S...

Spin glass state in doped La2CuO4

The lightly doped La2CuO4 of the high temperature superconducting Cu oxides shows spin glass behavior at very low temperatures, which reflects the effects of quantum fluctuations and frustration upon doping. Recent neutron scattering experiments revealed a formation of spin stripes at the same low concentration of doping. A specific relation between the two important properties of spin glass be...

Spin glass behavior in Sr2Mn0.7Fe0.3MoO6

Spin glass behavior in FeAl2

Magnetic and transport measurements indicate FeAl2 to be an ordered intermetallic spin glass, with canonical behavior including a susceptibility cusp at T f535 K and frequency-dependent susceptibility below T f . The field-cooled and zero-field-cooled magnetization diverge below T f , with hysteresis characteristic of a spin glass. A resistivity minimum just above T f is explained in terms of c...

Magnonlike dispersion of spin resonance in Ni-doped BaFe2As2.

Inelastic neutron scattering measurements on Ba(Fe0.963Ni0.037)2As2 manifest a neutron spin resonance in the superconducting state with anisotropic dispersion within the Fe layer. Whereas the resonance is sharply peaked at the antiferromagnetic (AFM) wave vector Q(AFM) along the orthorhombic a axis, the resonance disperses upwards away from Q(AFM) along the b axis. In contrast to the downward d...