Neutron as a probe to study magnetization reversal in a spinel compound, CoCr^sub 1.9^Fe^sub 0.1^O^sub 4
Neutron depolarization and neutron diffraction techniques have been employed to investigate the origin of magnetization reversal in CoCr1.9Fe0.1O4 spinel compound. The spinel compound crystallizes in a face centered cubic (space group: Fd-3m) structure where Co2+ and (Cr/Fe)3+ ions occupy the tetrah...
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| Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2018-12, Vol.551, p.104 |
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| creator | Kumar, Amit Yusuf, SM |
| description | Neutron depolarization and neutron diffraction techniques have been employed to investigate the origin of magnetization reversal in CoCr1.9Fe0.1O4 spinel compound. The spinel compound crystallizes in a face centered cubic (space group: Fd-3m) structure where Co2+ and (Cr/Fe)3+ ions occupy the tetrahedral 8a and octahedral 16d sites, respectively. The temperature dependent magnetization curves for magnetic fields = 1 kOe show a magnetization reversal below the compensation temperature (Tcomp ~ 40 K). The neutron depolarization measurements infer that the average magnetization of each domain becomes negligibly small at the TComp. Temperature dependent neutron diffraction study, a microscopic tool to understand sublattice magnetization, infers an antiparallel coupling between the tetrahedral (Co) and octahedral (Cr/Fe) site moments with ordered magnetic moments of -3.1(1) and 1.0(1) µB, respectively, at 30 K. Our neutron diffraction study also reveals that the unequal growth of the antiferromagnetically coupled tetrahedral and octahedral site moments across the TComp plays an important role in realizing the magnetization reversal in this spinel compound. |
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The spinel compound crystallizes in a face centered cubic (space group: Fd-3m) structure where Co2+ and (Cr/Fe)3+ ions occupy the tetrahedral 8a and octahedral 16d sites, respectively. The temperature dependent magnetization curves for magnetic fields = 1 kOe show a magnetization reversal below the compensation temperature (Tcomp ~ 40 K). The neutron depolarization measurements infer that the average magnetization of each domain becomes negligibly small at the TComp. Temperature dependent neutron diffraction study, a microscopic tool to understand sublattice magnetization, infers an antiparallel coupling between the tetrahedral (Co) and octahedral (Cr/Fe) site moments with ordered magnetic moments of -3.1(1) and 1.0(1) µB, respectively, at 30 K. Our neutron diffraction study also reveals that the unequal growth of the antiferromagnetically coupled tetrahedral and octahedral site moments across the TComp plays an important role in realizing the magnetization reversal in this spinel compound.</description><identifier>ISSN: 0921-4526</identifier><identifier>EISSN: 1873-2135</identifier><language>eng</language><publisher>Amsterdam: Elsevier BV</publisher><subject>Antiferromagnetism ; Chromium ; Cobalt ; Crystal structure ; Depolarization ; Diffraction ; Iron ; Lattices (mathematics) ; Magnetic moments ; Magnetism ; Magnetization curves ; Magnetization reversal ; Neutron diffraction ; Neutrons ; Spinel ; Subgroups ; Temperature ; Temperature dependence</subject><ispartof>Physica. B, Condensed matter, 2018-12, Vol.551, p.104</ispartof><rights>Copyright Elsevier BV Dec 15, 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780</link.rule.ids></links><search><creatorcontrib>Kumar, Amit</creatorcontrib><creatorcontrib>Yusuf, SM</creatorcontrib><title>Neutron as a probe to study magnetization reversal in a spinel compound, CoCr^sub 1.9^Fe^sub 0.1^O^sub 4</title><title>Physica. B, Condensed matter</title><description>Neutron depolarization and neutron diffraction techniques have been employed to investigate the origin of magnetization reversal in CoCr1.9Fe0.1O4 spinel compound. The spinel compound crystallizes in a face centered cubic (space group: Fd-3m) structure where Co2+ and (Cr/Fe)3+ ions occupy the tetrahedral 8a and octahedral 16d sites, respectively. The temperature dependent magnetization curves for magnetic fields = 1 kOe show a magnetization reversal below the compensation temperature (Tcomp ~ 40 K). The neutron depolarization measurements infer that the average magnetization of each domain becomes negligibly small at the TComp. Temperature dependent neutron diffraction study, a microscopic tool to understand sublattice magnetization, infers an antiparallel coupling between the tetrahedral (Co) and octahedral (Cr/Fe) site moments with ordered magnetic moments of -3.1(1) and 1.0(1) µB, respectively, at 30 K. Our neutron diffraction study also reveals that the unequal growth of the antiferromagnetically coupled tetrahedral and octahedral site moments across the TComp plays an important role in realizing the magnetization reversal in this spinel compound.</description><subject>Antiferromagnetism</subject><subject>Chromium</subject><subject>Cobalt</subject><subject>Crystal structure</subject><subject>Depolarization</subject><subject>Diffraction</subject><subject>Iron</subject><subject>Lattices (mathematics)</subject><subject>Magnetic moments</subject><subject>Magnetism</subject><subject>Magnetization curves</subject><subject>Magnetization reversal</subject><subject>Neutron diffraction</subject><subject>Neutrons</subject><subject>Spinel</subject><subject>Subgroups</subject><subject>Temperature</subject><subject>Temperature dependence</subject><issn>0921-4526</issn><issn>1873-2135</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNqNjc0KwjAQhIMoWH_eYcGrlW6rtj0XxZNePLdEXbVSk5pNBH16g_gAzmU-mA-mIwLM0iSMMVl0RRDlMYbzRbzsiwHzLfLBFANx3ZKzRiuQDBJaow8EVgNbd3rBXV4U2fotbe0NQ08yLBuovQ3c1ooaOOp7q506TaHQhSnZHQBnebmmL0YzLHdfmo9E7ywbpvGvh2KyXu2LTeg_H47YVjftjPJTFWOGaZJFOSb_WR-4hEdH</recordid><startdate>20181215</startdate><enddate>20181215</enddate><creator>Kumar, Amit</creator><creator>Yusuf, SM</creator><general>Elsevier BV</general><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20181215</creationdate><title>Neutron as a probe to study magnetization reversal in a spinel compound, CoCr^sub 1.9^Fe^sub 0.1^O^sub 4</title><author>Kumar, Amit ; Yusuf, SM</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_21817380913</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Antiferromagnetism</topic><topic>Chromium</topic><topic>Cobalt</topic><topic>Crystal structure</topic><topic>Depolarization</topic><topic>Diffraction</topic><topic>Iron</topic><topic>Lattices (mathematics)</topic><topic>Magnetic moments</topic><topic>Magnetism</topic><topic>Magnetization curves</topic><topic>Magnetization reversal</topic><topic>Neutron diffraction</topic><topic>Neutrons</topic><topic>Spinel</topic><topic>Subgroups</topic><topic>Temperature</topic><topic>Temperature dependence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kumar, Amit</creatorcontrib><creatorcontrib>Yusuf, SM</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Physica. B, Condensed matter</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kumar, Amit</au><au>Yusuf, SM</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Neutron as a probe to study magnetization reversal in a spinel compound, CoCr^sub 1.9^Fe^sub 0.1^O^sub 4</atitle><jtitle>Physica. B, Condensed matter</jtitle><date>2018-12-15</date><risdate>2018</risdate><volume>551</volume><spage>104</spage><pages>104-</pages><issn>0921-4526</issn><eissn>1873-2135</eissn><abstract>Neutron depolarization and neutron diffraction techniques have been employed to investigate the origin of magnetization reversal in CoCr1.9Fe0.1O4 spinel compound. The spinel compound crystallizes in a face centered cubic (space group: Fd-3m) structure where Co2+ and (Cr/Fe)3+ ions occupy the tetrahedral 8a and octahedral 16d sites, respectively. The temperature dependent magnetization curves for magnetic fields = 1 kOe show a magnetization reversal below the compensation temperature (Tcomp ~ 40 K). The neutron depolarization measurements infer that the average magnetization of each domain becomes negligibly small at the TComp. Temperature dependent neutron diffraction study, a microscopic tool to understand sublattice magnetization, infers an antiparallel coupling between the tetrahedral (Co) and octahedral (Cr/Fe) site moments with ordered magnetic moments of -3.1(1) and 1.0(1) µB, respectively, at 30 K. Our neutron diffraction study also reveals that the unequal growth of the antiferromagnetically coupled tetrahedral and octahedral site moments across the TComp plays an important role in realizing the magnetization reversal in this spinel compound.</abstract><cop>Amsterdam</cop><pub>Elsevier BV</pub></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Antiferromagnetism Chromium Cobalt Crystal structure Depolarization Diffraction Iron Lattices (mathematics) Magnetic moments Magnetism Magnetization curves Magnetization reversal Neutron diffraction Neutrons Spinel Subgroups Temperature Temperature dependence |
| title | Neutron as a probe to study magnetization reversal in a spinel compound, CoCr^sub 1.9^Fe^sub 0.1^O^sub 4 |
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