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Bangura, A.F.

Carrington, A.

Coldea, A.I.

Coldea, R.

Jansen, M

Malone, L.

McCollam, A.

McDonald, R.D.

Rhee, P.G. van

Seabra, L.

Shannon, N.

Sörgel, T.

Vignolles, D.

arXiv

Coldea, A.

Bangura, A.

van Rhee, P.

McDonald, R.

Sorgel, T.

Jansen, M.

MPG.PuRe

Cascade of field-induced magnetic transitions in a frustrated antiferromagnetic metal

NARCIS 

Frustrated magnets can exhibit many novel forms of order when exposed to high magnetic fields. Much less, however, is known about materials where frustration occurs in the presence of itinerant electrons. Here we report thermodynamic and transport measurements on micron-size single crystals of the triangular-lattice metallic antiferromagnet 2H-AgNiO2, in magnetic fields of up to 90 T and temperatures down to 0.35 K. We observe a cascade of magnetic phase transitions at 13.5, 20, 28, and 39 T in fields applied along the easy axis, and we combine magnetic torque, specific heat, and transport data to construct the field-temperature phase diagram. The low-field experimental data are compared with theoretical calculations for a frustrated easy-axis Heisenberg model based on realistic parameters for the localized moments of AgNiO2. Deviations from this model's predictions are attributed to the role played by the itinerant electrons.</p

Coldea, A. I.

Bangura, A. F.

Van Rhee, P. G.

McDonald, R. D.

Explore Bristol Research

I. Coldea, A.

Mccollam, A.

F. Bangura, A.

Vignolles, David

G. van Rhee, P.

D. Mcdonald, R.

Soergel, T.

HAL-INSA Toulouse

Radboud Repository

Frustrated magnets can exhibit many novel forms of order when exposed to high
magnetic fields, however, much less is known about materials where frustration
occurs in the presence of itinerant electrons. Here we report thermodynamic and
transport measurements on micron-sized single crystals of the
triangular-lattice metallic antiferromagnet 2H-AgNiO2, in magnetic fields of up
to 90 T and temperatures down to 0.35 K. We observe a cascade of magnetic phase
transitions at 13.5 20, 28 and 39T in fields applied along the easy axis, and
we combine magnetic torque, specific heat and transport data to construct the
field-temperature phase diagram. The results are discussed in the context of a
frustrated easy-axis Heisenberg model for the localized moments where
intermediate applied magnetic fields are predicted to stabilize a magnetic
supersolid phase. Deviations in the measured phase diagram from this model
predictions are attributed to the role played by the itinerant electrons

Coldea, AI

Seabra, L

McCollam, A

Carrington, A

Malone, L

Bangura, AF

Vignolles, D

Rhee, PGV

McDonald, RD

Sorgel, T

Shannon, N

Coldea, R

Oxford University Research Archive (ORA)

Physical Review B

Cascade of field-induced magnetic transitions in a frustrated
  antiferromagnetic metal

Hal-Diderot

Cascade of field-induced magnetic transitions in a frustrated antiferromagnetic metal

Abstract

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MPG.PuRe

NARCIS

Explore Bristol Research

HAL-INSA Toulouse

MPG.PuRe

Radboud Repository

Oxford University Research Archive (ORA)

Hal-Diderot