AUTHOR=Wan Jiajie , Liu Yan , Wan Yuanqing , Wu Qing , Wang Yu , Yang Jiyong , Mao Zhiqiang , Wang Junzhong 

TITLE=Hall Effect Study of the Metamagnetic Transition in the Sr4(Ru0.99Fe0.01)3O10 Nanosheet

JOURNAL=Frontiers in Materials

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.856000

DOI=10.3389/fmats.2022.856000

ISSN=2296-8016

ABSTRACT=<p>Sr<sub>4</sub>(Ru<sub>0.99</sub>Fe<sub>0.01</sub>)<sub>3</sub>O<sub>10</sub> shows a ferromagnetic (FM) transition at <italic>T</italic><sub><italic>C</italic></sub> ∼ 105 K with the magnetic easy axis in the <italic>ab</italic> plane, followed by a metamagnetic transition (MMT) at low temperatures when the magnetic field <italic>H</italic> is applied along the <italic>c</italic> axis, which is in sharp contrast to that of the pure Sr<sub>4</sub>Ru<sub>3</sub>O<sub>10</sub>, where the easy axis is along the <italic>c</italic> axis and the MMT is in the <italic>ab</italic> plane. Here, we studied the MMT in the Sr<sub>4</sub>(Ru<sub>0.99</sub>Fe<sub>0.01</sub>)<sub>3</sub>O<sub>10</sub> nanosheet by the Hall effect. It was found that the ordinary Hall coefficient of Sr<sub>4</sub>(Ru<sub>0.99</sub>Fe<sub>0.01</sub>)<sub>3</sub>O<sub>10</sub> is almost the same as that of the pure Sr<sub>4</sub>Ru<sub>3</sub>O<sub>10</sub>, while a sudden increase in the Hall resistance <italic>R</italic><sub><italic>xy</italic></sub> is observed below ∼50 K, above which the <italic>R</italic><sub><italic>xy</italic></sub> presents the conventional anomalous Hall effect up to <italic>T</italic><sub><italic>C</italic></sub>. Analysis of the results indicates that the MMT has no direct correlation to the electronic structure but closely relates to the magnetic moment locking, where the magnetic-field-induced breakdown of the locked moments is responsible for the MMT.</p>