Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt$_{x}$Pd$_{1-x}
Antiferromagnets are emerging as promising alternatives to ferromagnets in spintronics applications. A key feature of antiferromagnets is their anisotropic magnetoresistance (AMR), which has the potential to serve as a sensitive marker for the antiferromagnetic order parameter. However, the underlyi...
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creator | Yadav, Shivesh Verma, Mohit Gupta, Shikhar Kumar Paul, Debjoty Kulkarni, Nilesh Kashyap, Arti Chatterjee, Shouvik |
description | Antiferromagnets are emerging as promising alternatives to ferromagnets in
spintronics applications. A key feature of antiferromagnets is their
anisotropic magnetoresistance (AMR), which has the potential to serve as a
sensitive marker for the antiferromagnetic order parameter. However, the
underlying origins of this behavior remain poorly understood. In this study, we
report the observation of AMR in epitaxial thin films of the collinear L1$_{0}$
antiferromagnet MnPt$_{x}$Pd$_{1-x}$. In thicker films, the AMR is dominated by
a non-crystalline two-fold component. As the film thickness is reduced,
however, a crystalline four-fold component emerges, accompanied by the
appearance of uncompensated magnetic moment, which strongly modifies the
magnetotransport properties in the thinner films. We demonstrate that
interfacial interactions lead to a large density of states (DOS) at the Fermi
level. This enhanced DOS, combined with disorder in thinner films, stabilizes
the uncompensated moment and induces a four-fold modulation of the DOS as the
Neel vector rotates, explaining the observed AMR behavior. |
doi_str_mv | 10.48550/arxiv.2412.04207 |
format | Article |
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spintronics applications. A key feature of antiferromagnets is their
anisotropic magnetoresistance (AMR), which has the potential to serve as a
sensitive marker for the antiferromagnetic order parameter. However, the
underlying origins of this behavior remain poorly understood. In this study, we
report the observation of AMR in epitaxial thin films of the collinear L1$_{0}$
antiferromagnet MnPt$_{x}$Pd$_{1-x}$. In thicker films, the AMR is dominated by
a non-crystalline two-fold component. As the film thickness is reduced,
however, a crystalline four-fold component emerges, accompanied by the
appearance of uncompensated magnetic moment, which strongly modifies the
magnetotransport properties in the thinner films. We demonstrate that
interfacial interactions lead to a large density of states (DOS) at the Fermi
level. This enhanced DOS, combined with disorder in thinner films, stabilizes
the uncompensated moment and induces a four-fold modulation of the DOS as the
Neel vector rotates, explaining the observed AMR behavior.</description><identifier>DOI: 10.48550/arxiv.2412.04207</identifier><language>eng</language><subject>Physics - Materials Science ; Physics - Mesoscale and Nanoscale Physics</subject><creationdate>2024-12</creationdate><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,885</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2412.04207$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2412.04207$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Yadav, Shivesh</creatorcontrib><creatorcontrib>Verma, Mohit</creatorcontrib><creatorcontrib>Gupta, Shikhar Kumar</creatorcontrib><creatorcontrib>Paul, Debjoty</creatorcontrib><creatorcontrib>Kulkarni, Nilesh</creatorcontrib><creatorcontrib>Kashyap, Arti</creatorcontrib><creatorcontrib>Chatterjee, Shouvik</creatorcontrib><title>Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt$_{x}$Pd$_{1-x}</title><description>Antiferromagnets are emerging as promising alternatives to ferromagnets in
spintronics applications. A key feature of antiferromagnets is their
anisotropic magnetoresistance (AMR), which has the potential to serve as a
sensitive marker for the antiferromagnetic order parameter. However, the
underlying origins of this behavior remain poorly understood. In this study, we
report the observation of AMR in epitaxial thin films of the collinear L1$_{0}$
antiferromagnet MnPt$_{x}$Pd$_{1-x}$. In thicker films, the AMR is dominated by
a non-crystalline two-fold component. As the film thickness is reduced,
however, a crystalline four-fold component emerges, accompanied by the
appearance of uncompensated magnetic moment, which strongly modifies the
magnetotransport properties in the thinner films. We demonstrate that
interfacial interactions lead to a large density of states (DOS) at the Fermi
level. This enhanced DOS, combined with disorder in thinner films, stabilizes
the uncompensated moment and induces a four-fold modulation of the DOS as the
Neel vector rotates, explaining the observed AMR behavior.</description><subject>Physics - Materials Science</subject><subject>Physics - Mesoscale and Nanoscale Physics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNqFzrEOgjAUheEuDkZ9ACc7sIIFIboaA3EhYXBvGmjlJqUlbTU1hne3EnenM5xv-BHapiTJT0VB9sx4eCZZnmYJyTNyXKK-0g8TCy07fFZgtTN6hBbX7K6404ZbsI6plmNQATgQ3Bg9zG9g5QiOeWAS3_oAKpCDxVrgWjUuom8_RU0XNo39tEYLwaTlm9-u0K4qb5drPDfR0cDAzIt-2-jcdvgvPuLxRVs</recordid><startdate>20241205</startdate><enddate>20241205</enddate><creator>Yadav, Shivesh</creator><creator>Verma, Mohit</creator><creator>Gupta, Shikhar Kumar</creator><creator>Paul, Debjoty</creator><creator>Kulkarni, Nilesh</creator><creator>Kashyap, Arti</creator><creator>Chatterjee, Shouvik</creator><scope>GOX</scope></search><sort><creationdate>20241205</creationdate><title>Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt$_{x}$Pd$_{1-x}</title><author>Yadav, Shivesh ; Verma, Mohit ; Gupta, Shikhar Kumar ; Paul, Debjoty ; Kulkarni, Nilesh ; Kashyap, Arti ; Chatterjee, Shouvik</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-arxiv_primary_2412_042073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Physics - Materials Science</topic><topic>Physics - Mesoscale and Nanoscale Physics</topic><toplevel>online_resources</toplevel><creatorcontrib>Yadav, Shivesh</creatorcontrib><creatorcontrib>Verma, Mohit</creatorcontrib><creatorcontrib>Gupta, Shikhar Kumar</creatorcontrib><creatorcontrib>Paul, Debjoty</creatorcontrib><creatorcontrib>Kulkarni, Nilesh</creatorcontrib><creatorcontrib>Kashyap, Arti</creatorcontrib><creatorcontrib>Chatterjee, Shouvik</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Yadav, Shivesh</au><au>Verma, Mohit</au><au>Gupta, Shikhar Kumar</au><au>Paul, Debjoty</au><au>Kulkarni, Nilesh</au><au>Kashyap, Arti</au><au>Chatterjee, Shouvik</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt$_{x}$Pd$_{1-x}</atitle><date>2024-12-05</date><risdate>2024</risdate><abstract>Antiferromagnets are emerging as promising alternatives to ferromagnets in
spintronics applications. A key feature of antiferromagnets is their
anisotropic magnetoresistance (AMR), which has the potential to serve as a
sensitive marker for the antiferromagnetic order parameter. However, the
underlying origins of this behavior remain poorly understood. In this study, we
report the observation of AMR in epitaxial thin films of the collinear L1$_{0}$
antiferromagnet MnPt$_{x}$Pd$_{1-x}$. In thicker films, the AMR is dominated by
a non-crystalline two-fold component. As the film thickness is reduced,
however, a crystalline four-fold component emerges, accompanied by the
appearance of uncompensated magnetic moment, which strongly modifies the
magnetotransport properties in the thinner films. We demonstrate that
interfacial interactions lead to a large density of states (DOS) at the Fermi
level. This enhanced DOS, combined with disorder in thinner films, stabilizes
the uncompensated moment and induces a four-fold modulation of the DOS as the
Neel vector rotates, explaining the observed AMR behavior.</abstract><doi>10.48550/arxiv.2412.04207</doi><oa>free_for_read</oa></addata></record> |
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title | Four-fold Anisotropic Magnetoresistance in Antiferromagnetic Epitaxial Thin Films of MnPt$_{x}$Pd$_{1-x} |
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