Supplementary information files for "Emergence of a Hidden Magnetic Phase in LaFe11.8Si1.2 Investigated by Inelastic Neutron Scattering as a Function of Magnetic Field and Temperature"

Supplementary information files for "Emergence of a hidden magnetic phase in LaFe₁₁_<em>.</em>₈Si₁_<em>.</em>₂ investigated by inelastic neutron scattering as a function of magnetic field and temperature"The NaZn13 type itinerant magnet LaFe_13−xSi_x 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.<br><br>©The Author(s), 2024

《利用非弹性中子散射研究磁场与温度依赖的LaFe₁.₈Si₁.₂中隐藏磁相的出现》补充信息文件

NaZn₁₃型巡游磁体LaFe₁₃₋ₓSiₓ因兼具大磁热效应与低磁滞的独特性质而受到广泛关注。本研究结合磁测量、定制化微量热法与非弹性中子散射对该合金展开探究。非弹性中子散射结果显示，存在横跨磁相变的宽频准弹性散射信号，该信号被归因于自旋涨落。此外，当x=1.2时，在Q=0.52 Å⁻¹处观测到准弹性峰，该峰仅存在于临近巡游变磁转变的顺磁态中；研究团队据此认为，这一现象表明驱动该体系一级相变的隐藏磁相已然出现。

©作者(s)，2024