O. Friedt

Incommensurate magnetic ordering in Sr2Ru(1-x)TixO4.

In Sr2RuO4 the spin excitation spectrum is dominated by incommensurate fluctuations at q = (0.3 0.3q(z)), which arise from Fermi-surface nesting. We show that upon Ti substitution, known to suppress superconductivity, a short range magnetic order develops with a propagation vector (0.307 0.307 1). In Sr2Ru0.91Ti0.09O4, the ordered moment points along the c direction. This finding shows that superconducting Sr2RuO4 is extremely close to an incommensurate spin density wave instability.

Incommensurate Magnetic Ordering inSr2Ru1−xTixO4

In Sr2RuO4 the spin excitation spectrum is dominated by incommensurate fluctuations at q = (0.3 0.3q(z)), which arise from Fermi-surface nesting. We show that upon Ti substitution, known to suppress superconductivity, a short range magnetic order develops with a propagation vector (0.307 0.307 1). In Sr2Ru0.91Ti0.09O4, the ordered moment points along the c direction. This finding shows that superconducting Sr2RuO4 is extremely close to an incommensurate spin density wave instability.

Structural aspects of metamagnetism in Ca2-xSrxRuO4 : Evidence for field tuning of orbital occupation

The crystal structure of Ca_{2-x}Sr_xRuO_4 with 0.2<x<1.0 has been studied by diffraction techniques and by high resolution capacitance dilatometry as a function of temperature and magnetic field. Upon cooling in zero magnetic field below about 25 K the structure shrinks along the c-direction and elongates in the a, b planes (0.2<x<1.0), whereas the opposite occurs upon cooling at high-field (x = 0.2 and 0.5). These findings indicate an orbital rearrangement driven by temperature and magnetic field, which accompanies the metamagnetic transition in these compounds.

Magnetoelastic Coupling Across the Metamagnetic Transition in Ca2-xSrxRuO4{(0.2\leq x\leq 0.5)}

The magnetoelastic coupling in Ca

Thermodynamic properties of (Ca,Sr)2RuO4(Ca,Sr)2RuO4 in magnetic fields

_{1.8}

Thermodynamic properties of (Ca,Sr)2RuO4 in magnetic fields

Sr

Thermodynamic properties of in magnetic fields

_{0.2}

The phase-diagram of Ca 2-x Sr x RuO 4 : Relation between crystal distortions and physical properties

RuO

Hard X-Ray Diffraction Studies of La1−xSrxMnO3

_4

INTERPLAY BETWEEN CHARGE ORDER, MAGNETISM, AND STRUCTURE IN LA0.875SR0.125MNO3

and in Ca