Unveiling the magnetic and transport properties of La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1)

•Effect of V doping on the structural, magnetic and transport properties of La0.5Sr0.5CoO3 compound are being investigated.•Dominant FM interactions with increased TC as well as magnetic moment due to V doping is noticed.•Enhanced metallicity as a result of delocalization of electrons with V content...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2021-07, Vol.530, p.167851, Article 167851
Hauptverfasser: Nancy, Poojitha, Bommareddy, Shukla, R., Vasundhara, M., Mohammed Rasi, U.P., Gangineni, R.B., Sahoo, S.C., Choudhary, R.J., Bitla, Yugandhar, Patra, Ajit K.
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container_start_page 167851
container_title Journal of magnetism and magnetic materials
container_volume 530
creator Nancy
Poojitha, Bommareddy
Shukla, R.
Vasundhara, M.
Mohammed Rasi, U.P.
Gangineni, R.B.
Sahoo, S.C.
Choudhary, R.J.
Bitla, Yugandhar
Patra, Ajit K.
description •Effect of V doping on the structural, magnetic and transport properties of La0.5Sr0.5CoO3 compound are being investigated.•Dominant FM interactions with increased TC as well as magnetic moment due to V doping is noticed.•Enhanced metallicity as a result of delocalization of electrons with V content supports the FM behaviour.•A proposed mechanism is consistent with all the experimental observations. La0.5Sr0.5CoO3−δ system displaying coexistence of metallicity and ferromagnetism, and the interplay between distinct spin states of Co ions has gained significant attention from the fundamental as well as the applications point of view. In this regard, the effect of V5+ doping on the dynamics of spin and oxidation states of Co ions in the La0.5Sr0.5CoO3−δ system has been studied using structural, X-ray photoemission spectroscopy, magnetic and transport measurements. The La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1) series was prepared by conventional solid-state reaction method and its chemical homogeneity was established by inductively coupled plasma mass spectroscopy. The increase of lattice parameters/volume with increasing V5+ content in rhombohedrally crystallized (R3-c) samples is attributed to the presence of Co2+ ions . The presence of Co2+ ions and the reduction of Co3+ ion concentration with V substitution is verified from the results of core-level photoemission spectra of Co. Detailed magnetic measurements show an increase in Curie temperature, effective magnetic moment, soft magnetic nature and suggesting strengthening of underlying magnetic interactions. As a result of multiple oxidation states of Co ions and the delocalization of electrons, rise in the conductivity is noticed. Such enhancement in the conductivity and ferromagnetic ordering temperature, simultaneously, with V doping implies a strong coupling between spin and charge degrees of freedom. To understand the underlying mechanism more clearly, different possible scenarios have been discussed. The most appropriate scenario i.e., the conversion of Co3+ ions into Co2+ ions and admixture of Co4+ ion spin states with V5+ doping was found to be consistent with all the experimental observations.
doi_str_mv 10.1016/j.jmmm.2021.167851
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La0.5Sr0.5CoO3−δ system displaying coexistence of metallicity and ferromagnetism, and the interplay between distinct spin states of Co ions has gained significant attention from the fundamental as well as the applications point of view. In this regard, the effect of V5+ doping on the dynamics of spin and oxidation states of Co ions in the La0.5Sr0.5CoO3−δ system has been studied using structural, X-ray photoemission spectroscopy, magnetic and transport measurements. The La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1) series was prepared by conventional solid-state reaction method and its chemical homogeneity was established by inductively coupled plasma mass spectroscopy. The increase of lattice parameters/volume with increasing V5+ content in rhombohedrally crystallized (R3-c) samples is attributed to the presence of Co2+ ions . The presence of Co2+ ions and the reduction of Co3+ ion concentration with V substitution is verified from the results of core-level photoemission spectra of Co. Detailed magnetic measurements show an increase in Curie temperature, effective magnetic moment, soft magnetic nature and suggesting strengthening of underlying magnetic interactions. As a result of multiple oxidation states of Co ions and the delocalization of electrons, rise in the conductivity is noticed. Such enhancement in the conductivity and ferromagnetic ordering temperature, simultaneously, with V doping implies a strong coupling between spin and charge degrees of freedom. To understand the underlying mechanism more clearly, different possible scenarios have been discussed. 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La0.5Sr0.5CoO3−δ system displaying coexistence of metallicity and ferromagnetism, and the interplay between distinct spin states of Co ions has gained significant attention from the fundamental as well as the applications point of view. In this regard, the effect of V5+ doping on the dynamics of spin and oxidation states of Co ions in the La0.5Sr0.5CoO3−δ system has been studied using structural, X-ray photoemission spectroscopy, magnetic and transport measurements. The La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1) series was prepared by conventional solid-state reaction method and its chemical homogeneity was established by inductively coupled plasma mass spectroscopy. The increase of lattice parameters/volume with increasing V5+ content in rhombohedrally crystallized (R3-c) samples is attributed to the presence of Co2+ ions . The presence of Co2+ ions and the reduction of Co3+ ion concentration with V substitution is verified from the results of core-level photoemission spectra of Co. Detailed magnetic measurements show an increase in Curie temperature, effective magnetic moment, soft magnetic nature and suggesting strengthening of underlying magnetic interactions. As a result of multiple oxidation states of Co ions and the delocalization of electrons, rise in the conductivity is noticed. Such enhancement in the conductivity and ferromagnetic ordering temperature, simultaneously, with V doping implies a strong coupling between spin and charge degrees of freedom. To understand the underlying mechanism more clearly, different possible scenarios have been discussed. The most appropriate scenario i.e., the conversion of Co3+ ions into Co2+ ions and admixture of Co4+ ion spin states with V5+ doping was found to be consistent with all the experimental observations.</description><subject>Admixtures</subject><subject>Cobalt</subject><subject>Cobaltites</subject><subject>Crystallization</subject><subject>Curie temperature</subject><subject>Doping</subject><subject>Ferromagnetism</subject><subject>Homogeneity</subject><subject>Inductively coupled plasma mass spectrometry</subject><subject>Ion concentration</subject><subject>Lattice parameters</subject><subject>Magnetic measurement</subject><subject>Magnetic moments</subject><subject>Magnetic properties</subject><subject>Metallicity</subject><subject>Oxidation</subject><subject>Photoelectric emission</subject><subject>Spectrum analysis</subject><subject>Spin dynamics</subject><subject>Spin state transition</subject><subject>Substitution reactions</subject><subject>Transport properties</subject><subject>XPS</subject><issn>0304-8853</issn><issn>1873-4766</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kE1O5DAUhK0RSDQwF2BlaTYgkeDnv04kZoFa_EktsQBmaxnnmXGGJD12GjU3YM0JOAQn4AAcgpOQplmzebWpqlf6CNkBlgMDfVDnddM0OWccctDjQsEPMoJiLDI51nqNjJhgMisKJTbIZko1YwxkoUfk33V7j-EutLe0_4u0sbct9sFR21a0j7ZNsy72dBa7GcY-YKKdp1PLcnUZhzPp4P3xafFncSEGfXuhu4vX59-vz2yfspzB5-WfXcPOvW2y7u1dwp9fukWuT46vJmfZ9OL0fHI0zRyXos-clBZAe4TSFdaLqnRjYI6D0jdSS6ErWSj0JWdCe3CIvuClgpsSpBXSa7FFfq16h9n_55h6U3fz2A4vDVdCSKaUFIOLr1wudilF9GYWQ2PjgwFmllBNbZZQzRKqWUEdQoerEA777wNGk1zA1mEVIrreVF34Lv4BYCl_EQ</recordid><startdate>20210715</startdate><enddate>20210715</enddate><creator>Nancy</creator><creator>Poojitha, Bommareddy</creator><creator>Shukla, R.</creator><creator>Vasundhara, M.</creator><creator>Mohammed Rasi, U.P.</creator><creator>Gangineni, R.B.</creator><creator>Sahoo, S.C.</creator><creator>Choudhary, R.J.</creator><creator>Bitla, Yugandhar</creator><creator>Patra, Ajit K.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20210715</creationdate><title>Unveiling the magnetic and transport properties of La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1)</title><author>Nancy ; Poojitha, Bommareddy ; Shukla, R. ; Vasundhara, M. ; Mohammed Rasi, U.P. ; Gangineni, R.B. ; Sahoo, S.C. ; Choudhary, R.J. ; Bitla, Yugandhar ; Patra, Ajit K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c243t-c44a116fe19c8af3d9c710c2156b46436d485ef92036f1ceef82951b914a34f63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Admixtures</topic><topic>Cobalt</topic><topic>Cobaltites</topic><topic>Crystallization</topic><topic>Curie temperature</topic><topic>Doping</topic><topic>Ferromagnetism</topic><topic>Homogeneity</topic><topic>Inductively coupled plasma mass spectrometry</topic><topic>Ion concentration</topic><topic>Lattice parameters</topic><topic>Magnetic measurement</topic><topic>Magnetic moments</topic><topic>Magnetic properties</topic><topic>Metallicity</topic><topic>Oxidation</topic><topic>Photoelectric emission</topic><topic>Spectrum analysis</topic><topic>Spin dynamics</topic><topic>Spin state transition</topic><topic>Substitution reactions</topic><topic>Transport properties</topic><topic>XPS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nancy</creatorcontrib><creatorcontrib>Poojitha, Bommareddy</creatorcontrib><creatorcontrib>Shukla, R.</creatorcontrib><creatorcontrib>Vasundhara, M.</creatorcontrib><creatorcontrib>Mohammed Rasi, U.P.</creatorcontrib><creatorcontrib>Gangineni, R.B.</creatorcontrib><creatorcontrib>Sahoo, S.C.</creatorcontrib><creatorcontrib>Choudhary, R.J.</creatorcontrib><creatorcontrib>Bitla, Yugandhar</creatorcontrib><creatorcontrib>Patra, Ajit K.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials 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>Journal of magnetism and magnetic materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nancy</au><au>Poojitha, Bommareddy</au><au>Shukla, R.</au><au>Vasundhara, M.</au><au>Mohammed Rasi, U.P.</au><au>Gangineni, R.B.</au><au>Sahoo, S.C.</au><au>Choudhary, R.J.</au><au>Bitla, Yugandhar</au><au>Patra, Ajit K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Unveiling the magnetic and transport properties of La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1)</atitle><jtitle>Journal of magnetism and magnetic materials</jtitle><date>2021-07-15</date><risdate>2021</risdate><volume>530</volume><spage>167851</spage><pages>167851-</pages><artnum>167851</artnum><issn>0304-8853</issn><eissn>1873-4766</eissn><abstract>•Effect of V doping on the structural, magnetic and transport properties of La0.5Sr0.5CoO3 compound are being investigated.•Dominant FM interactions with increased TC as well as magnetic moment due to V doping is noticed.•Enhanced metallicity as a result of delocalization of electrons with V content supports the FM behaviour.•A proposed mechanism is consistent with all the experimental observations. La0.5Sr0.5CoO3−δ system displaying coexistence of metallicity and ferromagnetism, and the interplay between distinct spin states of Co ions has gained significant attention from the fundamental as well as the applications point of view. In this regard, the effect of V5+ doping on the dynamics of spin and oxidation states of Co ions in the La0.5Sr0.5CoO3−δ system has been studied using structural, X-ray photoemission spectroscopy, magnetic and transport measurements. The La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1) series was prepared by conventional solid-state reaction method and its chemical homogeneity was established by inductively coupled plasma mass spectroscopy. The increase of lattice parameters/volume with increasing V5+ content in rhombohedrally crystallized (R3-c) samples is attributed to the presence of Co2+ ions . The presence of Co2+ ions and the reduction of Co3+ ion concentration with V substitution is verified from the results of core-level photoemission spectra of Co. Detailed magnetic measurements show an increase in Curie temperature, effective magnetic moment, soft magnetic nature and suggesting strengthening of underlying magnetic interactions. As a result of multiple oxidation states of Co ions and the delocalization of electrons, rise in the conductivity is noticed. Such enhancement in the conductivity and ferromagnetic ordering temperature, simultaneously, with V doping implies a strong coupling between spin and charge degrees of freedom. To understand the underlying mechanism more clearly, different possible scenarios have been discussed. The most appropriate scenario i.e., the conversion of Co3+ ions into Co2+ ions and admixture of Co4+ ion spin states with V5+ doping was found to be consistent with all the experimental observations.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jmmm.2021.167851</doi></addata></record>
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subjects Admixtures
Cobalt
Cobaltites
Crystallization
Curie temperature
Doping
Ferromagnetism
Homogeneity
Inductively coupled plasma mass spectrometry
Ion concentration
Lattice parameters
Magnetic measurement
Magnetic moments
Magnetic properties
Metallicity
Oxidation
Photoelectric emission
Spectrum analysis
Spin dynamics
Spin state transition
Substitution reactions
Transport properties
XPS
title Unveiling the magnetic and transport properties of La0.5Sr0.5Co1−xVxO3−δ (x = 0, 0.01, 0.02 and 0.1)
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