Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles
We intend to understand the ferromagnetism and magnetodielectric (MD) phenomenon in NiO nanoparticles (NPs) with average diameter ~23 nm synthesized by a chemical route. Magnetic studies revealed that NiO NPs are weakly ferromagnetic (FM). Notably, temperature-dependent magnetization studies show a...
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| Veröffentlicht in: | IEEE transactions on magnetics 2019-02, Vol.55 (2), p.1-4 |
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| creator | Roy, Subir Katoch, Rajesh Angappane, S. |
| description | We intend to understand the ferromagnetism and magnetodielectric (MD) phenomenon in NiO nanoparticles (NPs) with average diameter ~23 nm synthesized by a chemical route. Magnetic studies revealed that NiO NPs are weakly ferromagnetic (FM). Notably, temperature-dependent magnetization studies show a bifurcation of the FC-ZFC curves, suggesting a competition between FM and antiferromagnetic (AFM) interactions with the blocking temperature ( T_{B} ) at ~210 K. In addition, we observed field-dependent exchange bias effect in the NPs. Furthermore, MD studies revealed that the changes in the dielectric constant and loss induced by the magnetic field are strongly frequency dependent, which originates from the combined effect of extrinsic Maxwell-Wagner polarization along with magnetoresistance. It was found that the magnetoimpedance (MI) changes sign from negative at low frequencies to positive at higher frequencies of an excitation signal. Cole-Cole studies showed that the negative MI at low frequencies arises from FM surface/grain boundary, and positive MI at higher frequencies originates from AFM core of NiO NPs. |
| doi_str_mv | 10.1109/TMAG.2018.2865678 |
| format | Article |
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Magnetic studies revealed that NiO NPs are weakly ferromagnetic (FM). Notably, temperature-dependent magnetization studies show a bifurcation of the FC-ZFC curves, suggesting a competition between FM and antiferromagnetic (AFM) interactions with the blocking temperature (<inline-formula> <tex-math notation="LaTeX">T_{B} </tex-math></inline-formula>) at ~210 K. In addition, we observed field-dependent exchange bias effect in the NPs. Furthermore, MD studies revealed that the changes in the dielectric constant and loss induced by the magnetic field are strongly frequency dependent, which originates from the combined effect of extrinsic Maxwell-Wagner polarization along with magnetoresistance. It was found that the magnetoimpedance (MI) changes sign from negative at low frequencies to positive at higher frequencies of an excitation signal. Cole-Cole studies showed that the negative MI at low frequencies arises from FM surface/grain boundary, and positive MI at higher frequencies originates from AFM core of NiO NPs.</description><identifier>ISSN: 0018-9464</identifier><identifier>EISSN: 1941-0069</identifier><identifier>DOI: 10.1109/TMAG.2018.2865678</identifier><identifier>CODEN: IEMGAQ</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Antiferromagnetism ; Bifurcations ; Chemical synthesis ; Dielectric relaxation ; Dielectric strength ; Ferromagnetism ; Frequency modulation ; Grain boundaries ; Low frequencies ; Magnetic cores ; Magnetic hysteresis ; Magnetic properties ; Magnetic tunneling ; Magnetism ; magnetodielectric (MD) ; Magnetoimpedance ; magnetoimpedance (MI) ; Magnetoresistance ; Magnetoresistivity ; Nanoparticles ; nanoparticles (NPs) ; Nickel oxides ; Organic chemistry ; Surface impedance ; Temperature dependence</subject><ispartof>IEEE transactions on magnetics, 2019-02, Vol.55 (2), p.1-4</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2019</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-abe27fa1652f5b3150aaa89bda19ee316bb964132c999f36cbcfdf2ba32de6343</citedby><cites>FETCH-LOGICAL-c293t-abe27fa1652f5b3150aaa89bda19ee316bb964132c999f36cbcfdf2ba32de6343</cites><orcidid>0000-0001-8475-0404</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/8477150$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27901,27902,54733</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/8477150$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Roy, Subir</creatorcontrib><creatorcontrib>Katoch, Rajesh</creatorcontrib><creatorcontrib>Angappane, S.</creatorcontrib><title>Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>We intend to understand the ferromagnetism and magnetodielectric (MD) phenomenon in NiO nanoparticles (NPs) with average diameter ~23 nm synthesized by a chemical route. Magnetic studies revealed that NiO NPs are weakly ferromagnetic (FM). Notably, temperature-dependent magnetization studies show a bifurcation of the FC-ZFC curves, suggesting a competition between FM and antiferromagnetic (AFM) interactions with the blocking temperature (<inline-formula> <tex-math notation="LaTeX">T_{B} </tex-math></inline-formula>) at ~210 K. In addition, we observed field-dependent exchange bias effect in the NPs. Furthermore, MD studies revealed that the changes in the dielectric constant and loss induced by the magnetic field are strongly frequency dependent, which originates from the combined effect of extrinsic Maxwell-Wagner polarization along with magnetoresistance. It was found that the magnetoimpedance (MI) changes sign from negative at low frequencies to positive at higher frequencies of an excitation signal. Cole-Cole studies showed that the negative MI at low frequencies arises from FM surface/grain boundary, and positive MI at higher frequencies originates from AFM core of NiO NPs.</description><subject>Antiferromagnetism</subject><subject>Bifurcations</subject><subject>Chemical synthesis</subject><subject>Dielectric relaxation</subject><subject>Dielectric strength</subject><subject>Ferromagnetism</subject><subject>Frequency modulation</subject><subject>Grain boundaries</subject><subject>Low frequencies</subject><subject>Magnetic cores</subject><subject>Magnetic hysteresis</subject><subject>Magnetic properties</subject><subject>Magnetic tunneling</subject><subject>Magnetism</subject><subject>magnetodielectric (MD)</subject><subject>Magnetoimpedance</subject><subject>magnetoimpedance (MI)</subject><subject>Magnetoresistance</subject><subject>Magnetoresistivity</subject><subject>Nanoparticles</subject><subject>nanoparticles (NPs)</subject><subject>Nickel oxides</subject><subject>Organic chemistry</subject><subject>Surface impedance</subject><subject>Temperature dependence</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9UMtOwzAQtBBIlMIHIC6ROKf4kTjxsapKQeqDQzlwsjbJprhK7eCkEvw9Dq04rXZnZndnCLlndMIYVU_b1XQx4ZTlE57LVGb5BRkxlbCYUqkuyYgGKFaJTK7JTdftQ5ukjI7Ix_y79-B8ZSz4n-gZvXcH2FnsTRnN3LFtjN1FYKto9Td1lcEGy94H-O0TrTughcjYaG020Rqsa8EHaYPdLbmqoenw7lzH5P15vp29xMvN4nU2XcYlV6KPoUCe1cBkyuu0ECylAJCrogKmEAWTRaFkwgQvlVK1kGVR1lXNCxC8QikSMSaPp72td19H7Hq9d0dvw0nNmRwsZ0oEFjuxSu-6zmOtW28OwbJmVA8J6iFBPSSozwkGzcNJYxDxn58nWRa-FL_neG5d</recordid><startdate>20190201</startdate><enddate>20190201</enddate><creator>Roy, Subir</creator><creator>Katoch, Rajesh</creator><creator>Angappane, S.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-8475-0404</orcidid></search><sort><creationdate>20190201</creationdate><title>Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles</title><author>Roy, Subir ; Katoch, Rajesh ; Angappane, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-abe27fa1652f5b3150aaa89bda19ee316bb964132c999f36cbcfdf2ba32de6343</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Antiferromagnetism</topic><topic>Bifurcations</topic><topic>Chemical synthesis</topic><topic>Dielectric relaxation</topic><topic>Dielectric strength</topic><topic>Ferromagnetism</topic><topic>Frequency modulation</topic><topic>Grain boundaries</topic><topic>Low frequencies</topic><topic>Magnetic cores</topic><topic>Magnetic hysteresis</topic><topic>Magnetic properties</topic><topic>Magnetic tunneling</topic><topic>Magnetism</topic><topic>magnetodielectric (MD)</topic><topic>Magnetoimpedance</topic><topic>magnetoimpedance (MI)</topic><topic>Magnetoresistance</topic><topic>Magnetoresistivity</topic><topic>Nanoparticles</topic><topic>nanoparticles (NPs)</topic><topic>Nickel oxides</topic><topic>Organic chemistry</topic><topic>Surface impedance</topic><topic>Temperature dependence</topic><toplevel>online_resources</toplevel><creatorcontrib>Roy, Subir</creatorcontrib><creatorcontrib>Katoch, Rajesh</creatorcontrib><creatorcontrib>Angappane, S.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Roy, Subir</au><au>Katoch, Rajesh</au><au>Angappane, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>2019-02-01</date><risdate>2019</risdate><volume>55</volume><issue>2</issue><spage>1</spage><epage>4</epage><pages>1-4</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>We intend to understand the ferromagnetism and magnetodielectric (MD) phenomenon in NiO nanoparticles (NPs) with average diameter ~23 nm synthesized by a chemical route. Magnetic studies revealed that NiO NPs are weakly ferromagnetic (FM). Notably, temperature-dependent magnetization studies show a bifurcation of the FC-ZFC curves, suggesting a competition between FM and antiferromagnetic (AFM) interactions with the blocking temperature (<inline-formula> <tex-math notation="LaTeX">T_{B} </tex-math></inline-formula>) at ~210 K. In addition, we observed field-dependent exchange bias effect in the NPs. Furthermore, MD studies revealed that the changes in the dielectric constant and loss induced by the magnetic field are strongly frequency dependent, which originates from the combined effect of extrinsic Maxwell-Wagner polarization along with magnetoresistance. It was found that the magnetoimpedance (MI) changes sign from negative at low frequencies to positive at higher frequencies of an excitation signal. Cole-Cole studies showed that the negative MI at low frequencies arises from FM surface/grain boundary, and positive MI at higher frequencies originates from AFM core of NiO NPs.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TMAG.2018.2865678</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0001-8475-0404</orcidid></addata></record> |
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| subjects | Antiferromagnetism Bifurcations Chemical synthesis Dielectric relaxation Dielectric strength Ferromagnetism Frequency modulation Grain boundaries Low frequencies Magnetic cores Magnetic hysteresis Magnetic properties Magnetic tunneling Magnetism magnetodielectric (MD) Magnetoimpedance magnetoimpedance (MI) Magnetoresistance Magnetoresistivity Nanoparticles nanoparticles (NPs) Nickel oxides Organic chemistry Surface impedance Temperature dependence |
| title | Extraordinary Ferromagnetic Coupling and Magnetodielectric Phenomena in NiO Nanoparticles |
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