Publications related to Exotic phases of quantum frustrated magnets

Temperature dependence of antiferromagnetic resonance mode in two-dimensional system Ni-5(TeO3)(4)Br-2

Antiferromangentic resonance (AFMR) in layered Ni-5(TeO3)(4)Br-2 system with a geometrically frustrated Ni2+ (S =1) spin arrangement has been investigated. Temperature dependence of the lowest mode resonant field could be described with a simple two sublat ...

2008

Muon spin spectroscopy evidence of a charge density wave in magnetite below the Verwey transition

Helmuth Berger

We present muon spectroscopy data on a Fe3O4 single crystal, revealing different spin precession patterns in five distinct temperature ranges. A careful analysis of the local field and its straightforward modeling obtains surprisingly good agreement with e ...

2008

Systematic Investigation of a New Family of Transition-Metal Phosphates Exhibiting Field-Dependent Magnetization Steps

Wendy Lee Queen, Lei Wang

We recently reported a low-dimensional compd., RbNa3Fe7(PO4)6, that contains electronically confined magnetic nanostructures (Angew.Chem. Int. Ed. 2007, 46, 5344-5347). The field dependent magnetization plot of RbNa3Fe7(PO4)3 shows stepped variations at in ...

American Chemical Society2007

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Tatjana Hählen

This report describes an AC-susceptibility study on

LiHo_xY_{1−x}F_4

.

LiHo_xY_{1−x}F_4 has different phases depending on the concentration x of holmium. Pure

LiHoF_4

is a ferromagnet, at concentrations of

x \approx 0.20$ it is a spin glass and at con ...

2007

Wannier functions and exchange integrals: The example ofLiCu2O2

Frédéric Mila

Starting from a single band Hubbard model in the Wannier function basis, we revisit the problem of the ligand contribution to exchange and derive explicit formulas for the exchange integrals in metal oxide compounds in terms of atomic parameters that can b ...

2007

Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4

Henrik Moodysson Rønnow, Joël Mesot, Mechthild Enderle

Using polarized neutron scattering we establish that the magnetic order in La1.48Nd0.4Sr0.12CuO4 is either (i) one dimensionally modulated and collinear, consistent with the stripe model or (ii) two dimensionally modulated with a novel noncollinear structu ...

AMERICAN PHYSICAL SOC2007

Low-temperature spin-state transition in LaCoO3 investigated using resonant x-ray absorption at the CoK edge

Marco Grioni, Kazimierz Conder

LaCoO3 displays two broad anomalies in the DC magnetic susceptibility chi(DC), occurring, respectively, around 50 K and 500 K. We have investigated the first of them within the 10 K < T < RT temperature range using Co K alpha(1) x-ray absorption spectrosco ...

2006

Ferromagnetism at Room Temperature on Electrodeposited Co2+-Doped ZnO Thin Film

Jean-Philippe Ansermet, Jean-Pierre Abid

Predicted by the theory, ferromagnetism is expected in Co-doped ZnO. Recently, ferromagnetism above room temperature was reported in thin films as well as in bulk samples made of cobalt-doped zinc oxide. In this study, we report the preparation of ZnO dope ...

2006

Permalloy thin films exchange coupled to arrays of cobalt islands

Jürgen Brugger, Marc Antonius Friedrich van den Boogaart

Periodic arrays of elongated cobalt islands exchange coupled to continuous Permalloy thin films were fabricated using silicon nitride stencil masks and the magnetic spin configurations during magnetization reversal were studied with photoemission electron ...

2006

Condensation of magnons and spinons in a frustrated ladder

Frédéric Mila

Motivated by the ever-increasing experimental effort devoted to the properties of frustrated quantum magnets in a magnetic field, we present a careful and detailed theoretical analysis of a one-dimensional version of this problem, a frustrated ladder with ...

2006

Exotic phases of quantum frustrated magnets

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Temperature dependence of antiferromagnetic resonance mode in two-dimensional system Ni-5(TeO3)(4)Br-2

Muon spin spectroscopy evidence of a charge density wave in magnetite below the Verwey transition

Systematic Investigation of a New Family of Transition-Metal Phosphates Exhibiting Field-Dependent Magnetization Steps

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Wannier functions and exchange integrals: The example ofLiCu2O2

Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4

Low-temperature spin-state transition in LaCoO3 investigated using resonant x-ray absorption at the CoK edge

Ferromagnetism at Room Temperature on Electrodeposited Co2+-Doped ZnO Thin Film

Permalloy thin films exchange coupled to arrays of cobalt islands

Condensation of magnons and spinons in a frustrated ladder

Systematic Investigation of a New Family of Transition-Metal Phosphates Exhibiting Field-Dependent Magnetization Steps

Muon spin spectroscopy evidence of a charge density wave in magnetite below the Verwey transition

Temperature dependence of antiferromagnetic resonance mode in two-dimensional system Ni-5(TeO3)(4)Br-2

Wannier functions and exchange integrals: The example ofLiCu2O2

From quantum glass to addressable spin clusters in the model magnet LiHoxY1−xF4

Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4

Ferromagnetism at Room Temperature on Electrodeposited Co2+-Doped ZnO Thin Film

Low-temperature spin-state transition in LaCoO3 investigated using resonant x-ray absorption at the CoK edge

Permalloy thin films exchange coupled to arrays of cobalt islands

Condensation of magnons and spinons in a frustrated ladder