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. 2017 Jul 26;7:6545. doi: 10.1038/s41598-017-06728-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Magnetic entropy change as a function of temperature and field. (a) H − T surface plot of ΔS _M. (b) ΔS _M vs. T for ΔH = 100–1,000 Oe, which shows the behavior of the chiral and PM phases. For clarity, ΔS _M(T) is shown in steps of ΔH = 100 Oe. A temperature gap, ΔT, exists between T _C and the order-disorder transition at T*. Inset: ΔS _M vs. T for ΔH = H _C(T _C). (c) ΔS _M vs. ΔH for temperatures below and above T*. Inset: ΔS _M at 115 K which shows the peak, H _C,2, above which ΔS _M monotonically decreases with H, defined as the IC-C transition. The local minimum at H _C,1 defines the CHM−CSL crossover.