Magnetism in the S=1 frustrated antiferromagnet GeNi2O4 studied using implanted muons

Abstract

We present the results of a muon-spin relaxation study of GeNi2O4. We provide further clarification of the two transitions to the antiferromagnetic state and measure the magnetic field dependence of the heat capacity up to 14 T. Both oscillatory and relaxing signals are observed below the lower transition (at temperature $T_{N2}) in the muon-decay positron asymmetry spectra, arising from two distinct types of magnetic environment. A possible explanation is suggested in terms of the separate ordering of two magnetic subsystems, one of which does not order fully down to the lowest measured temperature.

6 pages with 3 figures

References in corpus (8)

• Spin Ice State in Frustrated Magnetic Pyrochlore Materials
• Spin-polarized muons in condensed matter physics
• Local spin resonance and spin-Peierls-like phase transition in a geometrically frustrated antiferromagnet
• First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7
• Multiple Field-Induced Phase Transitions in a Geometrically-Frustrated Dipolar Magnet - Gd2Ti2O7
• Observation of two time scales in the ferromagnetic manganite La(1-x)Ca(x)MnO(3), x = 0.3
• Magnets with strong geometric frustration
• Phase diagrams of a classical two-dimensional Heisenberg antiferromagnet with single-ion anisotropy

Cited by in corpus (8)

• Magnetic frustration in the spinel compounds Ge Co_2 O_4 and Ge Ni_2 O_4
• Hedgehog-lattice spin texture in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
• Structural distortion below the Néel temperature in spinel GeCo${}_2$O${}_4$
• The kagome staircase compounds Ni${}_3$V${}_2$O${}_8$ and Co${}_3$V${}_2$O${}_8$ studied with implanted muons
• Hedgehog lattice and field-induced chirality in breathing-pyrochlore Heisenberg antiferromagnets
• Magnetic Field Induced Phase Transition in Spinel GeNi2O4
• Stabilization of high-pressure GeCu${}_2$O${}_4$ spinel cuprate with quasi-1D $S=1/2$ chains in the epitaxial thin-film form
• Epitaxial stabilization of thin films of the frustrated Ge-based spinels