Anomalous size dependence of the coercivity of nanopatterned CrGeTe3
The coercivity of single-domain magnetic nanoparticles typically decreases with the nanoparticle size and reaches zero when thermal fluctuations overcome the magnetic anisotropy. Here, we used SQUID-on-tip microscopy to investigate the coercivity of square-shaped CrGeTe3 nanoislands with a wide rang...
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| Veröffentlicht in: | Nanoscale 2024-10, Vol.16 (41), p.19504-19509 |
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| container_issue | 41 |
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| container_title | Nanoscale |
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| creator | Avia Noah Fridman, Nofar Zur, Yishay Klang, Maya Herrera, Edwin Moreno, Jose Antonio Huber, Martin E Suderow, Hermann Steinberg, Hadar Millo, Oded Anahory, Yonathan |
| description | The coercivity of single-domain magnetic nanoparticles typically decreases with the nanoparticle size and reaches zero when thermal fluctuations overcome the magnetic anisotropy. Here, we used SQUID-on-tip microscopy to investigate the coercivity of square-shaped CrGeTe3 nanoislands with a wide range of sizes and width-to-thickness aspect ratios. The results reveal an anomalous size-dependent coercivity, with smaller islands exhibiting higher coercivity. The nonconventional scaling of the coercivity in CrGeTe3 nanoislands was found to be inversely proportional to the island width and thickness (1/wd). This scaling implies that the nanoisland magnetic anisotropy is proportional to the perimeter rather than the volume, suggesting a magnetic edge state. In addition, we observe that 1600 nm wide islands display multi-domain structures with zero net remnant field, corresponding to the magnetic properties of pristine CrGeTe3 flakes. Our findings highlight the significant influence of edge states on the magnetic properties of CrGeTe3 and deepen our understanding of low-dimensional magnetic systems. |
| doi_str_mv | 10.1039/d4nr02106a |
| format | Article |
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Our findings highlight the significant influence of edge states on the magnetic properties of CrGeTe3 and deepen our understanding of low-dimensional magnetic systems.</description><subject>Aspect ratio</subject><subject>Chemistry</subject><subject>Coercivity</subject><subject>Magnetic anisotropy</subject><subject>Magnetic properties</subject><subject>Nanoparticles</subject><subject>Superconducting quantum interference devices</subject><subject>Thickness</subject><issn>2040-3364</issn><issn>2040-3372</issn><issn>2040-3372</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNpdkMFKw0AQhhdRbK1efIKAFy_RnZ3NpnuSUrUKBS_1HLabiU1JduMmKdSnN8Ui6GmG-T8--Iexa-B3wFHf59IFLoArc8LGgkseI6bi9HdXcsQu2nbLudKo8JyNUGOSTBUfs8eZ87WpfN9GbflFUU4NuZycpcgXUbehyHoKttyV3f5wccb5xnQdBUd5NA8LWhFesrPCVC1dHeeEvT8_reYv8fJt8TqfLeNG4LSLKZU8tVZKMLmVaQ6FJGtAiWRaIGkr7HookYLhGmgtEyOHEEgKnSYWJeKEPfx4m35dU27JdcFUWRPK2oR95k2Z_U1cuck-_C4DkDJRWg-G26Mh-M-e2i6ry9ZSVRlHww8yBBAACnU6oDf_0K3vgxv6HSitAWWi8RtM73Kl</recordid><startdate>20241024</startdate><enddate>20241024</enddate><creator>Avia Noah</creator><creator>Fridman, Nofar</creator><creator>Zur, Yishay</creator><creator>Klang, Maya</creator><creator>Herrera, Edwin</creator><creator>Moreno, Jose Antonio</creator><creator>Huber, Martin E</creator><creator>Suderow, Hermann</creator><creator>Steinberg, Hadar</creator><creator>Millo, Oded</creator><creator>Anahory, Yonathan</creator><general>Royal Society of Chemistry</general><general>The Royal Society of Chemistry</general><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20241024</creationdate><title>Anomalous size dependence of the coercivity of nanopatterned CrGeTe3</title><author>Avia Noah ; Fridman, Nofar ; Zur, Yishay ; Klang, Maya ; Herrera, Edwin ; Moreno, Jose Antonio ; Huber, Martin E ; Suderow, Hermann ; Steinberg, Hadar ; Millo, Oded ; Anahory, Yonathan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p238t-e7407cc441adc47d1f4eca16258f3e9c2cb10671a091eb45a4a161e42975c3433</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Aspect ratio</topic><topic>Chemistry</topic><topic>Coercivity</topic><topic>Magnetic anisotropy</topic><topic>Magnetic properties</topic><topic>Nanoparticles</topic><topic>Superconducting quantum interference devices</topic><topic>Thickness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Avia Noah</creatorcontrib><creatorcontrib>Fridman, Nofar</creatorcontrib><creatorcontrib>Zur, Yishay</creatorcontrib><creatorcontrib>Klang, Maya</creatorcontrib><creatorcontrib>Herrera, Edwin</creatorcontrib><creatorcontrib>Moreno, Jose Antonio</creatorcontrib><creatorcontrib>Huber, Martin E</creatorcontrib><creatorcontrib>Suderow, Hermann</creatorcontrib><creatorcontrib>Steinberg, Hadar</creatorcontrib><creatorcontrib>Millo, Oded</creatorcontrib><creatorcontrib>Anahory, Yonathan</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Nanoscale</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Avia Noah</au><au>Fridman, Nofar</au><au>Zur, Yishay</au><au>Klang, Maya</au><au>Herrera, Edwin</au><au>Moreno, Jose Antonio</au><au>Huber, Martin E</au><au>Suderow, Hermann</au><au>Steinberg, Hadar</au><au>Millo, Oded</au><au>Anahory, Yonathan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Anomalous size dependence of the coercivity of nanopatterned CrGeTe3</atitle><jtitle>Nanoscale</jtitle><date>2024-10-24</date><risdate>2024</risdate><volume>16</volume><issue>41</issue><spage>19504</spage><epage>19509</epage><pages>19504-19509</pages><issn>2040-3364</issn><issn>2040-3372</issn><eissn>2040-3372</eissn><abstract>The coercivity of single-domain magnetic nanoparticles typically decreases with the nanoparticle size and reaches zero when thermal fluctuations overcome the magnetic anisotropy. Here, we used SQUID-on-tip microscopy to investigate the coercivity of square-shaped CrGeTe3 nanoislands with a wide range of sizes and width-to-thickness aspect ratios. The results reveal an anomalous size-dependent coercivity, with smaller islands exhibiting higher coercivity. The nonconventional scaling of the coercivity in CrGeTe3 nanoislands was found to be inversely proportional to the island width and thickness (1/wd). This scaling implies that the nanoisland magnetic anisotropy is proportional to the perimeter rather than the volume, suggesting a magnetic edge state. In addition, we observe that 1600 nm wide islands display multi-domain structures with zero net remnant field, corresponding to the magnetic properties of pristine CrGeTe3 flakes. Our findings highlight the significant influence of edge states on the magnetic properties of CrGeTe3 and deepen our understanding of low-dimensional magnetic systems.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><pmid>39355860</pmid><doi>10.1039/d4nr02106a</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Nanoscale, 2024-10, Vol.16 (41), p.19504-19509 |
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| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Aspect ratio Chemistry Coercivity Magnetic anisotropy Magnetic properties Nanoparticles Superconducting quantum interference devices Thickness |
| title | Anomalous size dependence of the coercivity of nanopatterned CrGeTe3 |
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