Magnetic and Transport Anomalies and Large Magnetocaloric Effect in Cubic IR/I[sub.4]PtAl
We report the electronic properties of R[sub.4] PtAl (R = Ho, and Er), which contains three sites for R, by the measurements of magnetization (ac and dc), heat-capacity, transport, and magnetoresistance (MR). Dc magnetization data reveal antiferromagnetic order below 19 K and 12 K in Ho and Er compo...
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| Veröffentlicht in: | Magnetochemistry 2023-03, Vol.9 (3) |
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| container_title | Magnetochemistry |
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| creator | Iyer, Ka Rayaprol, Sudhindra Kumar, Ram Matteppanavar, Shidaling Dodamani, Suneel Maiti, Kalobaran Sampathkumaran, Echur V |
| description | We report the electronic properties of R[sub.4] PtAl (R = Ho, and Er), which contains three sites for R, by the measurements of magnetization (ac and dc), heat-capacity, transport, and magnetoresistance (MR). Dc magnetization data reveal antiferromagnetic order below 19 K and 12 K in Ho and Er compounds, respectively. Additional features observed at lower temperatures (12 K for Ho[sub.4] PtAl and 5 K for Er[sub.4] PtAl) are akin to the cluster spin-glass phase. Resistivity data exhibit a weak minimum at a temperature marginally higher than their respective Néel temperature (T[sub.N] ), which is unusual for such rare-earths with well-localized 4f states. Isothermal magnetization and magnetoresistance data well below T[sub.N] exhibit signatures of a subtle field-induced magnetic transition for a small magnetic field ( |
| doi_str_mv | 10.3390/magnetochemistry9030085 |
| format | Article |
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Dc magnetization data reveal antiferromagnetic order below 19 K and 12 K in Ho and Er compounds, respectively. Additional features observed at lower temperatures (12 K for Ho[sub.4] PtAl and 5 K for Er[sub.4] PtAl) are akin to the cluster spin-glass phase. Resistivity data exhibit a weak minimum at a temperature marginally higher than their respective Néel temperature (T[sub.N] ), which is unusual for such rare-earths with well-localized 4f states. Isothermal magnetization and magnetoresistance data well below T[sub.N] exhibit signatures of a subtle field-induced magnetic transition for a small magnetic field (<10 kOe). Notably, the isothermal entropy change at T[sub.N] has the largest peak value within this rare-earth family; for a field change from zero to 50 kOe, the entropy change is ~14.5 J/kg K (Ho4PtAl) and ~21.5 J/kg K (Er[sub.4] PtAl) suggesting a role of anisotropy of 4f orbital in determining this large value. The results provide some clues for the advancement of the field of magnetocaloric effect. The magnetocaloric property of Er[sub.4] PtAl is nonhysteretic, meeting a challenge to find materials with reversible magnetocaloric effect.</description><identifier>ISSN: 2312-7481</identifier><identifier>EISSN: 2312-7481</identifier><identifier>DOI: 10.3390/magnetochemistry9030085</identifier><language>eng</language><publisher>MDPI AG</publisher><subject>Aluminum compounds ; Analysis ; Antiferromagnetism ; Crystals ; Electric properties ; Magnetic anomalies ; Magnetic properties ; Mechanical properties ; Platinum compounds ; Structure</subject><ispartof>Magnetochemistry, 2023-03, Vol.9 (3)</ispartof><rights>COPYRIGHT 2023 MDPI AG</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>314,780,784,864,27924,27925</link.rule.ids></links><search><creatorcontrib>Iyer, Ka</creatorcontrib><creatorcontrib>Rayaprol, Sudhindra</creatorcontrib><creatorcontrib>Kumar, Ram</creatorcontrib><creatorcontrib>Matteppanavar, Shidaling</creatorcontrib><creatorcontrib>Dodamani, Suneel</creatorcontrib><creatorcontrib>Maiti, Kalobaran</creatorcontrib><creatorcontrib>Sampathkumaran, Echur V</creatorcontrib><title>Magnetic and Transport Anomalies and Large Magnetocaloric Effect in Cubic IR/I[sub.4]PtAl</title><title>Magnetochemistry</title><description>We report the electronic properties of R[sub.4] PtAl (R = Ho, and Er), which contains three sites for R, by the measurements of magnetization (ac and dc), heat-capacity, transport, and magnetoresistance (MR). Dc magnetization data reveal antiferromagnetic order below 19 K and 12 K in Ho and Er compounds, respectively. Additional features observed at lower temperatures (12 K for Ho[sub.4] PtAl and 5 K for Er[sub.4] PtAl) are akin to the cluster spin-glass phase. Resistivity data exhibit a weak minimum at a temperature marginally higher than their respective Néel temperature (T[sub.N] ), which is unusual for such rare-earths with well-localized 4f states. Isothermal magnetization and magnetoresistance data well below T[sub.N] exhibit signatures of a subtle field-induced magnetic transition for a small magnetic field (<10 kOe). Notably, the isothermal entropy change at T[sub.N] has the largest peak value within this rare-earth family; for a field change from zero to 50 kOe, the entropy change is ~14.5 J/kg K (Ho4PtAl) and ~21.5 J/kg K (Er[sub.4] PtAl) suggesting a role of anisotropy of 4f orbital in determining this large value. The results provide some clues for the advancement of the field of magnetocaloric effect. The magnetocaloric property of Er[sub.4] PtAl is nonhysteretic, meeting a challenge to find materials with reversible magnetocaloric effect.</description><subject>Aluminum compounds</subject><subject>Analysis</subject><subject>Antiferromagnetism</subject><subject>Crystals</subject><subject>Electric properties</subject><subject>Magnetic anomalies</subject><subject>Magnetic properties</subject><subject>Mechanical properties</subject><subject>Platinum compounds</subject><subject>Structure</subject><issn>2312-7481</issn><issn>2312-7481</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNqVjkFrAjEQhYMoKNbfYP6A62yyurvHRSwVKoh4KaXIGJM1kk0kiYf--wbx0KvMYd774M0bQqY5ZJzXMO-wtTI6cZGdDtH_1sABqkWPjBjP2awsqrz_Tw_JJIQrADDIecnqEfnaPi5oQdGe6cGjDTfnI22s69BoGR78E30r6fZZhsb5FFgrJUWk2tLV_ZT8Zj_ffIf7KSt-drExb2Sg0AQ5ee4xyd7Xh9XHrEUjj9oqFz2KNOf0u3BWKp14Uxa8XC4XrOIvB_4AQodU6A</recordid><startdate>20230301</startdate><enddate>20230301</enddate><creator>Iyer, Ka</creator><creator>Rayaprol, Sudhindra</creator><creator>Kumar, Ram</creator><creator>Matteppanavar, Shidaling</creator><creator>Dodamani, Suneel</creator><creator>Maiti, Kalobaran</creator><creator>Sampathkumaran, Echur V</creator><general>MDPI AG</general><scope/></search><sort><creationdate>20230301</creationdate><title>Magnetic and Transport Anomalies and Large Magnetocaloric Effect in Cubic IR/I[sub.4]PtAl</title><author>Iyer, Ka ; Rayaprol, Sudhindra ; Kumar, Ram ; Matteppanavar, Shidaling ; Dodamani, Suneel ; Maiti, Kalobaran ; Sampathkumaran, Echur V</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-gale_infotracacademiconefile_A7437665283</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Aluminum compounds</topic><topic>Analysis</topic><topic>Antiferromagnetism</topic><topic>Crystals</topic><topic>Electric properties</topic><topic>Magnetic anomalies</topic><topic>Magnetic properties</topic><topic>Mechanical properties</topic><topic>Platinum compounds</topic><topic>Structure</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Iyer, Ka</creatorcontrib><creatorcontrib>Rayaprol, Sudhindra</creatorcontrib><creatorcontrib>Kumar, Ram</creatorcontrib><creatorcontrib>Matteppanavar, Shidaling</creatorcontrib><creatorcontrib>Dodamani, Suneel</creatorcontrib><creatorcontrib>Maiti, Kalobaran</creatorcontrib><creatorcontrib>Sampathkumaran, Echur V</creatorcontrib><jtitle>Magnetochemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Iyer, Ka</au><au>Rayaprol, Sudhindra</au><au>Kumar, Ram</au><au>Matteppanavar, Shidaling</au><au>Dodamani, Suneel</au><au>Maiti, Kalobaran</au><au>Sampathkumaran, Echur V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnetic and Transport Anomalies and Large Magnetocaloric Effect in Cubic IR/I[sub.4]PtAl</atitle><jtitle>Magnetochemistry</jtitle><date>2023-03-01</date><risdate>2023</risdate><volume>9</volume><issue>3</issue><issn>2312-7481</issn><eissn>2312-7481</eissn><abstract>We report the electronic properties of R[sub.4] PtAl (R = Ho, and Er), which contains three sites for R, by the measurements of magnetization (ac and dc), heat-capacity, transport, and magnetoresistance (MR). Dc magnetization data reveal antiferromagnetic order below 19 K and 12 K in Ho and Er compounds, respectively. Additional features observed at lower temperatures (12 K for Ho[sub.4] PtAl and 5 K for Er[sub.4] PtAl) are akin to the cluster spin-glass phase. Resistivity data exhibit a weak minimum at a temperature marginally higher than their respective Néel temperature (T[sub.N] ), which is unusual for such rare-earths with well-localized 4f states. Isothermal magnetization and magnetoresistance data well below T[sub.N] exhibit signatures of a subtle field-induced magnetic transition for a small magnetic field (<10 kOe). Notably, the isothermal entropy change at T[sub.N] has the largest peak value within this rare-earth family; for a field change from zero to 50 kOe, the entropy change is ~14.5 J/kg K (Ho4PtAl) and ~21.5 J/kg K (Er[sub.4] PtAl) suggesting a role of anisotropy of 4f orbital in determining this large value. The results provide some clues for the advancement of the field of magnetocaloric effect. The magnetocaloric property of Er[sub.4] PtAl is nonhysteretic, meeting a challenge to find materials with reversible magnetocaloric effect.</abstract><pub>MDPI AG</pub><doi>10.3390/magnetochemistry9030085</doi></addata></record> |
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| source | DOAJ Directory of Open Access Journals; MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals |
| subjects | Aluminum compounds Analysis Antiferromagnetism Crystals Electric properties Magnetic anomalies Magnetic properties Mechanical properties Platinum compounds Structure |
| title | Magnetic and Transport Anomalies and Large Magnetocaloric Effect in Cubic IR/I[sub.4]PtAl |
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