Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds
Negative thermal expansion (NTE) and magnetic properties were investigated for antiperovskite Ga1−xCrxN0.83Mn3 compounds. As x increases, the temperature span (ΔT) of NTE related with Γ5g antiferromagnetic (AFM) order is expanded and shifted to lower temperatures. At x = 0.1, NTE happens between 256...
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Frontiers Media S.A.
2018-03-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | http://journal.frontiersin.org/article/10.3389/fchem.2018.00075/full |
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| author | Xinge Guo Xinge Guo Peng Tong Jianchao Lin Cheng Yang Kui Zhang Shuai Lin Wenhai Song Yuping Sun Yuping Sun Yuping Sun |
| author_facet | Xinge Guo Xinge Guo Peng Tong Jianchao Lin Cheng Yang Kui Zhang Shuai Lin Wenhai Song Yuping Sun Yuping Sun Yuping Sun |
| author_sort | Xinge Guo |
| collection | DOAJ |
| description | Negative thermal expansion (NTE) and magnetic properties were investigated for antiperovskite Ga1−xCrxN0.83Mn3 compounds. As x increases, the temperature span (ΔT) of NTE related with Γ5g antiferromagnetic (AFM) order is expanded and shifted to lower temperatures. At x = 0.1, NTE happens between 256 and 318 K (ΔT = 62 K) with an average linear coefficient of thermal expansion, αL = −46 ppm/K. The ΔT is expanded to 81 K (151–232 K) in x = 0.2 with αL = −22.6 ppm/K. Finally, NTE is no longer visible for x ≥ 0.3. Ferromagnetic order is introduced by Cr doping and continuously strengthened with increasing x, which may impede the AFM ordering and thus account for the broadening of NTE temperature window. Moreover, our specific heat measurement suggests the electronic density of states at the Fermi level is enhanced upon Cr doping, which favors the FM order rather than the AFM one. |
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| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-10T19:16:16Z |
| publishDate | 2018-03-01 |
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| series | Frontiers in Chemistry |
| spelling | doaj.art-fd9337a8aa724713ba27f2b6c7362a9d2022-12-22T01:36:35ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462018-03-01610.3389/fchem.2018.00075349572Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 CompoundsXinge Guo0Xinge Guo1Peng Tong2Jianchao Lin3Cheng Yang4Kui Zhang5Shuai Lin6Wenhai Song7Yuping Sun8Yuping Sun9Yuping Sun10School of Science, Hebei University of Science and Technology, Shijiazhuang, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, ChinaHigh Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, ChinaCollaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, ChinaNegative thermal expansion (NTE) and magnetic properties were investigated for antiperovskite Ga1−xCrxN0.83Mn3 compounds. As x increases, the temperature span (ΔT) of NTE related with Γ5g antiferromagnetic (AFM) order is expanded and shifted to lower temperatures. At x = 0.1, NTE happens between 256 and 318 K (ΔT = 62 K) with an average linear coefficient of thermal expansion, αL = −46 ppm/K. The ΔT is expanded to 81 K (151–232 K) in x = 0.2 with αL = −22.6 ppm/K. Finally, NTE is no longer visible for x ≥ 0.3. Ferromagnetic order is introduced by Cr doping and continuously strengthened with increasing x, which may impede the AFM ordering and thus account for the broadening of NTE temperature window. Moreover, our specific heat measurement suggests the electronic density of states at the Fermi level is enhanced upon Cr doping, which favors the FM order rather than the AFM one.http://journal.frontiersin.org/article/10.3389/fchem.2018.00075/fullnegative thermal expansionantiferromagnetic orderspecific heatantiperovskite compoundsCr substitution |
| spellingShingle | Xinge Guo Xinge Guo Peng Tong Jianchao Lin Cheng Yang Kui Zhang Shuai Lin Wenhai Song Yuping Sun Yuping Sun Yuping Sun Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds Frontiers in Chemistry negative thermal expansion antiferromagnetic order specific heat antiperovskite compounds Cr substitution |
| title | Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds |
| title_full | Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds |
| title_fullStr | Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds |
| title_full_unstemmed | Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds |
| title_short | Effects of Cr Substitution on Negative Thermal Expansion and Magnetic Properties of Antiperovskite Ga1−xCrxN0.83Mn3 Compounds |
| title_sort | effects of cr substitution on negative thermal expansion and magnetic properties of antiperovskite ga1 xcrxn0 83mn3 compounds |
| topic | negative thermal expansion antiferromagnetic order specific heat antiperovskite compounds Cr substitution |
| url | http://journal.frontiersin.org/article/10.3389/fchem.2018.00075/full |
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