Fabrication of yttrium–iron–garnet/Pt multilayers for the longitudinal spin Seebeck effect
For longitudinal spin Seebeck effect (LSSE) devices, a multilayer structure comprising ferromagnetic and nonmagnetic layers is expected to improve their thermoelectric power. In this study, we developed a fabrication method for alternately stacked yttrium–iron–garnet (YIG)/Pt multilayer films on a g...
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| Veröffentlicht in: | Applied physics letters 2018-12, Vol.113 (26) |
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| creator | Nozue, Tatsuhiro Kikkawa, Takashi Watamura, Tomoki Niizeki, Tomohiko Ramos, Rafael Saitoh, Eiji Murakami, Hirohiko |
| description | For longitudinal spin Seebeck effect (LSSE) devices, a multilayer structure comprising
ferromagnetic and nonmagnetic layers is expected to improve their thermoelectric power. In
this study, we developed a fabrication method for alternately stacked yttrium–iron–garnet
(YIG)/Pt multilayer films on a gadolinium gallium garnet (GGG) (110) substrate,
GGG/[YIG(49 nm)/Pt(4 nm)]n
(n = 1–5) based on room-temperature sputtering and
ex-situ post-annealing methods and we evaluated their structural and
LSSE properties. The fabricated [YIG/Pt]n samples show flat
YIG/Pt interfaces and almost identical saturation magnetization
Ms although they contain polycrystalline YIG layers on Pt
layers as well as single-crystalline YIG layers on GGG. In the samples, we observed clear
LSSE signals and found that the LSSE thermoelectric power factor (PF) increases
monotonically with increasing n; the PF of the [YIG/Pt]5
sample is enhanced by a factor of ∼28 compared to that of [YIG/Pt]1. This work
may provide a guideline for developing future multilayer-based LSSE devices. |
| doi_str_mv | 10.1063/1.5046977 |
| format | Article |
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ferromagnetic and nonmagnetic layers is expected to improve their thermoelectric power. In
this study, we developed a fabrication method for alternately stacked yttrium–iron–garnet
(YIG)/Pt multilayer films on a gadolinium gallium garnet (GGG) (110) substrate,
GGG/[YIG(49 nm)/Pt(4 nm)]n
(n = 1–5) based on room-temperature sputtering and
ex-situ post-annealing methods and we evaluated their structural and
LSSE properties. The fabricated [YIG/Pt]n samples show flat
YIG/Pt interfaces and almost identical saturation magnetization
Ms although they contain polycrystalline YIG layers on Pt
layers as well as single-crystalline YIG layers on GGG. In the samples, we observed clear
LSSE signals and found that the LSSE thermoelectric power factor (PF) increases
monotonically with increasing n; the PF of the [YIG/Pt]5
sample is enhanced by a factor of ∼28 compared to that of [YIG/Pt]1. This work
may provide a guideline for developing future multilayer-based LSSE devices.</description><identifier>ISSN: 0003-6951</identifier><identifier>EISSN: 1077-3118</identifier><identifier>DOI: 10.1063/1.5046977</identifier><identifier>CODEN: APPLAB</identifier><language>eng</language><ispartof>Applied physics letters, 2018-12, Vol.113 (26)</ispartof><rights>Author(s)</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c365t-f98fd1050eec75300e4e3e11e4f6a0ef86382547fba3c0b4b21dfc94986f5ce53</citedby><cites>FETCH-LOGICAL-c365t-f98fd1050eec75300e4e3e11e4f6a0ef86382547fba3c0b4b21dfc94986f5ce53</cites><orcidid>0000-0002-7789-604X ; 0000-0001-5025-9465 ; 0000-0001-6840-3488</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://pubs.aip.org/apl/article-lookup/doi/10.1063/1.5046977$$EHTML$$P50$$Gscitation$$H</linktohtml><link.rule.ids>314,776,780,790,4497,27903,27904,76130</link.rule.ids></links><search><creatorcontrib>Nozue, Tatsuhiro</creatorcontrib><creatorcontrib>Kikkawa, Takashi</creatorcontrib><creatorcontrib>Watamura, Tomoki</creatorcontrib><creatorcontrib>Niizeki, Tomohiko</creatorcontrib><creatorcontrib>Ramos, Rafael</creatorcontrib><creatorcontrib>Saitoh, Eiji</creatorcontrib><creatorcontrib>Murakami, Hirohiko</creatorcontrib><title>Fabrication of yttrium–iron–garnet/Pt multilayers for the longitudinal spin Seebeck effect</title><title>Applied physics letters</title><description>For longitudinal spin Seebeck effect (LSSE) devices, a multilayer structure comprising
ferromagnetic and nonmagnetic layers is expected to improve their thermoelectric power. In
this study, we developed a fabrication method for alternately stacked yttrium–iron–garnet
(YIG)/Pt multilayer films on a gadolinium gallium garnet (GGG) (110) substrate,
GGG/[YIG(49 nm)/Pt(4 nm)]n
(n = 1–5) based on room-temperature sputtering and
ex-situ post-annealing methods and we evaluated their structural and
LSSE properties. The fabricated [YIG/Pt]n samples show flat
YIG/Pt interfaces and almost identical saturation magnetization
Ms although they contain polycrystalline YIG layers on Pt
layers as well as single-crystalline YIG layers on GGG. In the samples, we observed clear
LSSE signals and found that the LSSE thermoelectric power factor (PF) increases
monotonically with increasing n; the PF of the [YIG/Pt]5
sample is enhanced by a factor of ∼28 compared to that of [YIG/Pt]1. This work
may provide a guideline for developing future multilayer-based LSSE devices.</description><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqdkMFKAzEURYMoWKsL_yBbhWlfmklmZinFqlBQULcOmcx7NTqdlCQVuvMf_EO_xGoF964OFw4X7mXsVMBIgJZjMVKQ66oo9thAQFFkUohynw0AQGa6UuKQHcX4so1qIuWAPc1ME5w1yfmee-KblIJbLz_fP1zw_RYLE3pM47vEl-suuc5sMEROPvD0jLzz_cKldet60_G4cj2_R2zQvnIkQpuO2QGZLuLJL4fscXb5ML3O5rdXN9OLeWalVimjqqRWgAJEWygJgDlKFAJz0gaQSi3LicoLaoy00OTNRLRkq7wqNSmLSg7Z2a7XBh9jQKpXwS1N2NQC6u9jalH_HrN1z3dutC79DP-f_ObDn1ivWpJfsnd1ew</recordid><startdate>20181224</startdate><enddate>20181224</enddate><creator>Nozue, Tatsuhiro</creator><creator>Kikkawa, Takashi</creator><creator>Watamura, Tomoki</creator><creator>Niizeki, Tomohiko</creator><creator>Ramos, Rafael</creator><creator>Saitoh, Eiji</creator><creator>Murakami, Hirohiko</creator><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0002-7789-604X</orcidid><orcidid>https://orcid.org/0000-0001-5025-9465</orcidid><orcidid>https://orcid.org/0000-0001-6840-3488</orcidid></search><sort><creationdate>20181224</creationdate><title>Fabrication of yttrium–iron–garnet/Pt multilayers for the longitudinal spin Seebeck effect</title><author>Nozue, Tatsuhiro ; Kikkawa, Takashi ; Watamura, Tomoki ; Niizeki, Tomohiko ; Ramos, Rafael ; Saitoh, Eiji ; Murakami, Hirohiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c365t-f98fd1050eec75300e4e3e11e4f6a0ef86382547fba3c0b4b21dfc94986f5ce53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nozue, Tatsuhiro</creatorcontrib><creatorcontrib>Kikkawa, Takashi</creatorcontrib><creatorcontrib>Watamura, Tomoki</creatorcontrib><creatorcontrib>Niizeki, Tomohiko</creatorcontrib><creatorcontrib>Ramos, Rafael</creatorcontrib><creatorcontrib>Saitoh, Eiji</creatorcontrib><creatorcontrib>Murakami, Hirohiko</creatorcontrib><collection>CrossRef</collection><jtitle>Applied physics letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nozue, Tatsuhiro</au><au>Kikkawa, Takashi</au><au>Watamura, Tomoki</au><au>Niizeki, Tomohiko</au><au>Ramos, Rafael</au><au>Saitoh, Eiji</au><au>Murakami, Hirohiko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fabrication of yttrium–iron–garnet/Pt multilayers for the longitudinal spin Seebeck effect</atitle><jtitle>Applied physics letters</jtitle><date>2018-12-24</date><risdate>2018</risdate><volume>113</volume><issue>26</issue><issn>0003-6951</issn><eissn>1077-3118</eissn><coden>APPLAB</coden><abstract>For longitudinal spin Seebeck effect (LSSE) devices, a multilayer structure comprising
ferromagnetic and nonmagnetic layers is expected to improve their thermoelectric power. In
this study, we developed a fabrication method for alternately stacked yttrium–iron–garnet
(YIG)/Pt multilayer films on a gadolinium gallium garnet (GGG) (110) substrate,
GGG/[YIG(49 nm)/Pt(4 nm)]n
(n = 1–5) based on room-temperature sputtering and
ex-situ post-annealing methods and we evaluated their structural and
LSSE properties. The fabricated [YIG/Pt]n samples show flat
YIG/Pt interfaces and almost identical saturation magnetization
Ms although they contain polycrystalline YIG layers on Pt
layers as well as single-crystalline YIG layers on GGG. In the samples, we observed clear
LSSE signals and found that the LSSE thermoelectric power factor (PF) increases
monotonically with increasing n; the PF of the [YIG/Pt]5
sample is enhanced by a factor of ∼28 compared to that of [YIG/Pt]1. This work
may provide a guideline for developing future multilayer-based LSSE devices.</abstract><doi>10.1063/1.5046977</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0002-7789-604X</orcidid><orcidid>https://orcid.org/0000-0001-5025-9465</orcidid><orcidid>https://orcid.org/0000-0001-6840-3488</orcidid></addata></record> |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| title | Fabrication of yttrium–iron–garnet/Pt multilayers for the longitudinal spin Seebeck effect |
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