Emergence of a Hidden Magnetic Phase in LaFe11.8Si1.2 Investigated by Inelastic Neutron Scattering as a Function of Magnetic Field and Temperature
Authors:
Open Access
- 13 May 2024
- journal article
- research article
- Published by Wiley in Advanced Physics Research
- Vol. 3 (7)
Abstract
The 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.Keywords
Funding Information
- Engineering and Physical Sciences Research Council (EP/T034351/1, EP/P002811/1)
- ISIS Neutron and Muon Source (RB1120323, RB1320200)
This publication has 33 references indexed in Scilit:
- Upgrade of the MARI spectrometer at ISISNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2023
- High‐Throughput Design of Magnetocaloric Materials for Energy Applications: MM´X alloysAdvanced Science, 2023
- Moment‐Volume Coupling in La(Fe1−xSix)13Physica Status Solidi (b), 2017
- A review and new perspectives for the magnetocaloric effect: New materials and local heating and cooling inside the human bodyInternational Journal of Refrigeration, 2016
- Highly Interconnected Si Nanowires for Improved Stability Li‐Ion Battery AnodesAdvanced Energy Materials, 2011
- LET, a cold neutron multi-disk chopper spectrometer at ISISNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011
- Recent Progress in Exploring Magnetocaloric MaterialsAdvanced Materials, 2009
- Influence of spin fluctuations on thermodynamics of itinerant-electron metamagnetic transition in La(Fe0.88Si0.12)13 compoundJournal of Magnetism and Magnetic Materials, 2004
- Gd5(SixGe1-x)4: An Extremum MaterialAdvanced Materials, 2001
- Recent advances in magnetic structure determination by neutron powder diffractionPhysica B: Condensed Matter, 1993