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However, the vdW ferromagnet\u2010based \u201celectrical writing and magnetic reading\u201d memory has not been achieved at room\u2010temperature. Here, the room\u2010temperature electric\u2010field control of magnetization in Fe\n                    <jats:sub>5<\/jats:sub>\n                    GeTe\n                    <jats:sub>2<\/jats:sub>\n                    via the magnetoelectric coupling effect is reported. Fe\n                    <jats:sub>5<\/jats:sub>\n                    GeTe\n                    <jats:sub>2<\/jats:sub>\n                    exhibits significant spin\u2010lattice coupling in its magnetically ordered state, as revealed by Raman measurements. By modulating the lattice via strain\u2010mediated interfacial coupling between the ferromagnetic Fe\n                    <jats:sub>5<\/jats:sub>\n                    GeTe\n                    <jats:sub>2<\/jats:sub>\n                    and the piezoelectric Pb(Mg\n                    <jats:sub>1\/3<\/jats:sub>\n                    Nb\n                    <jats:sub>2\/3<\/jats:sub>\n                    )\n                    <jats:sub>0.7<\/jats:sub>\n                    Ti\n                    <jats:sub>0.3<\/jats:sub>\n                    O\n                    <jats:sub>3<\/jats:sub>\n                    substrate, a pronounced butterfly\u2010shaped electric\u2010field\u2010dependent magnetization is achieved, with a maximum magnetization change of 1.5\u00a0\u00d7\u00a010\n                    <jats:sup>\u22122<\/jats:sup>\n                    \u00a0\n                    <jats:italic>\u00b5<\/jats:italic>\n                    <jats:sub>B<\/jats:sub>\n                    per formula unit over an electric field range ofg \u00b115\u00a0kV\u00a0cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    at zero field and 300\u00a0K. The heterostructure exhibits two distinct, electrically switchable states\u2014either in magnetization magnitude or magnetoelectric response\u2014under pulsed electric fields. Notably, nonvolatile memory functionality achieved by encoding binary information in the magnetoelectric coefficient offers enhanced durability for long\u2010term data retention compared with encoding based on magnetization magnitude. These findings highlight the potential of van der Waals magnetic materials in next\u2010generation energy\u2010efficient spintronic devices and universal memory applications.\n                  <\/jats:p>","DOI":"10.1002\/smll.202510429","type":"journal-article","created":{"date-parts":[[2025,10,24]],"date-time":"2025-10-24T13:54:09Z","timestamp":1761314049000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Room\u2010Temperature Electric\u2010Field Control of Magnetization in a van der Waals Ferromagnet Fe\n                    <sub>5<\/sub>\n                    GeTe\n                    <sub>2<\/sub>\n                    for Nonvolatile Memory"],"prefix":"10.1002","volume":"21","author":[{"given":"Qingkai","family":"Wang","sequence":"first","affiliation":[{"name":"Center for High Pressure Science State Key Laboratory of Metastable Materials Science and Technology Yanshan University  Qinhuangdao 066000 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