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4–7 Jun 2019
Arabella Brauneck Hotel
Europe/Berlin timezone
Abstract submission and registration open until Wednesday, 29th May.

Precise magnetic structure of CeRhIn5 from neutron diffraction on absorption optimized samples.

4 Jun 2019, 18:30
20m
Arabella Brauneck Hotel

Arabella Brauneck Hotel

Münchner Str. 25 83661 Lenggries
Talk Spin wave and magnonics Spin wave and magnonics

Speaker

Vladimir Hutanu

Description

CeRhIn5 is a prototypical strongly correlated metal attracting much attention because of it peculiar magnetic and electronic properties. However, despite the intense studies two aspects of the ambient pressure magnetic structure of this heavy fermion material have remained under some debate since its discovery: whether the structure is indeed an incommensurate helix or a spin density wave, and what is the precise magnitude of the ordered magnetic moment. Contradictory results on this regard were reported in the literature. On the other side, the precise knowledge of the magnetic structure is an important prerequisite for the detailed theoretical modelling on the microscopic level. We suppose, that certain discrepancies in the previous results may be caused by the parasitic effects like strong absorption for the thermal neutrons by the elements like In or Rh and large sample sizes used in the precedent studies. By using a single crystal sample optimized for hot neutrons to minimize neutron absorption we performed a series of polarised and non-polarised neutron diffraction experiments clearly revealing both the helical type of the magnetic structure, and magnitude of the ordered moment of m = 0.54(2) μB. Moreover, studied macroscopic sample surprisingly presents a single chiral domain.

Primary author

Vladimir Hutanu

Co-authors

Dr David Fobes (Los Alamos National Laboratory, USA) Dr Andrew Sazonov (RWTH aachen University, Germany ) Dr Marc Janoschek (Paul Scherrer Institute, Viligen, Switzerland )

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