Emergence of a Hidden Magnetic Phase in LaFe11.8Si1.2 Investigated by Inelastic Neutron Scattering as a Function of Magnetic Field and Temperature-Reference-Cited by-同舟云学术

Emergence of a Hidden Magnetic Phase in LaFe₁₁_.₈Si₁_.₂ Investigated by Inelastic Neutron Scattering as a Function of Magnetic Field and Temperature

Published:2024-05-13 Issue:7 Volume:3 Page:
ISSN:2751-1200
Container-title:Advanced Physics Research
language:en
Short-container-title:Advanced Physics Research

Author:

Morrison Kelly¹^ORCID,Betouras Joseph J.¹,Venkat Guru²,Ewings Russell A.³,Caruana Andrew J.³,Skokov Konstantin P.⁴,Gutfleisch Oliver⁴,Cohen Lesley F.⁵

Affiliation:

1. Department of Physics and Centre for the Science of Materials Loughborough University Loughborough LE11 3TU UK

2. Department of Materials Science and Engineering University of Sheffield Sheffield S1 3JD UK

3. ISIS Pulsed Neutron and Muon Source STFC Rutherford Appleton Laboratory Harwell Campus, Didcot Oxon OX11 0QX UK

4. Institute of Materials Science Functional Materials Technical University Darmstadt 64287 Darmstadt Germany

5. The Blackett Laboratory Imperial College London South Kensington Campus London SW7 2AZ UK

Abstract

AbstractThe NaZn13 type itinerant magnet LaFe13−xSix has seen considerable interest due to its unique combination of large magnetocaloric effect and low hysteresis. Here, this alloy with a combination of magnetometry, bespoke microcalorimetry, and inelastic neutron scattering is investigated. Inelastic neutron scattering reveals the presence of broad quasielastic scattering that persists across the magnetic transition, which is attributed to spin fluctuations. In addition, a quasielastic peak is observed at Q = 0.52 Å−1 for x = 1.2 that exists only in the paramagnetic state in proximity to the itinerant metamagnetic transition and argue that this indicates emergence of a hidden mag the netic phase that drives the first‐order phase transition in this system.

Funder

Engineering and Physical Sciences Research Council

ISIS Neutron and Muon Source

Publisher

Wiley

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1002/apxr.202400008

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