The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys
In this experiment, a series of MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) alloy samples were prepared using a vacuum arc melting method. The crystal structure and magnetic properties of alloys were investigated using X-ray diffraction (XRD), Rietveld method, phys...
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| author | Yifei Bi Wei He Tonghan Yang Weining Wu Jingxian Wen Xi Yu Feikuo Chen |
| author_facet | Yifei Bi Wei He Tonghan Yang Weining Wu Jingxian Wen Xi Yu Feikuo Chen |
| author_sort | Yifei Bi |
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| description | In this experiment, a series of MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) alloy samples were prepared using a vacuum arc melting method. The crystal structure and magnetic properties of alloys were investigated using X-ray diffraction (XRD), Rietveld method, physical property measurement system (PPMS), and vibrating sample magnetometer (VSM) analyses. The results show that all samples were of high-temperature Ni<sub>2</sub>In-type phases, belonging to space group P6<sub>3</sub>/mmc (194) after 1373 K annealing. The results of Rietveld refinement revealed that the lattice constant and the volume of MnCoGe<sub>1−x</sub>La<sub>x</sub> increased along with the values of La constants. The magnetic measurement results show that the Curie temperatures (T<sub>C</sub>) of the MnCoGe<sub>1−x</sub>La<sub>x</sub> series alloys were 294, 281, and 278 K, respectively. The maximum magnetic entropy changes at 1.5T were 1.64, 1.53, and 1.56 J·kg<sup>−1</sup>·K<sup>−1</sup>, respectively. The respective refrigeration capacities (RC) were 60.68, 59.28, and 57.72J·kg<sup>−1</sup>, with a slight decrease along the series. The experimental results show that the doping of La results in decreased T<sub>C</sub>, basically unchanged magnetic entropy, and slightly decreased RC. |
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| spelling | doaj.art-12cf9cf417a547b69a6207482a42953c2023-11-22T04:18:09ZengMDPI AGMaterials1996-19442021-07-011414399810.3390/ma14143998The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) AlloysYifei Bi0Wei He1Tonghan Yang2Weining Wu3Jingxian Wen4Xi Yu5Feikuo Chen6School of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaSchool of Resources, Environment and Materials, Guangxi University, Nanning 530004, ChinaIn this experiment, a series of MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) alloy samples were prepared using a vacuum arc melting method. The crystal structure and magnetic properties of alloys were investigated using X-ray diffraction (XRD), Rietveld method, physical property measurement system (PPMS), and vibrating sample magnetometer (VSM) analyses. The results show that all samples were of high-temperature Ni<sub>2</sub>In-type phases, belonging to space group P6<sub>3</sub>/mmc (194) after 1373 K annealing. The results of Rietveld refinement revealed that the lattice constant and the volume of MnCoGe<sub>1−x</sub>La<sub>x</sub> increased along with the values of La constants. The magnetic measurement results show that the Curie temperatures (T<sub>C</sub>) of the MnCoGe<sub>1−x</sub>La<sub>x</sub> series alloys were 294, 281, and 278 K, respectively. The maximum magnetic entropy changes at 1.5T were 1.64, 1.53, and 1.56 J·kg<sup>−1</sup>·K<sup>−1</sup>, respectively. The respective refrigeration capacities (RC) were 60.68, 59.28, and 57.72J·kg<sup>−1</sup>, with a slight decrease along the series. The experimental results show that the doping of La results in decreased T<sub>C</sub>, basically unchanged magnetic entropy, and slightly decreased RC.https://www.mdpi.com/1996-1944/14/14/3998MnCoGe alloyrare earth dopingRietveld full spectrum fittingcrystal structuremagnetic properties |
| spellingShingle | Yifei Bi Wei He Tonghan Yang Weining Wu Jingxian Wen Xi Yu Feikuo Chen The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys Materials MnCoGe alloy rare earth doping Rietveld full spectrum fitting crystal structure magnetic properties |
| title | The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys |
| title_full | The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys |
| title_fullStr | The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys |
| title_full_unstemmed | The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys |
| title_short | The Effects of La Doping on the Crystal Structure and Magnetic Properties of Ni<sub>2</sub>In-Type MnCoGe<sub>1−x</sub>La<sub>x</sub> (x = 0, 0.01, 0.03) Alloys |
| title_sort | effects of la doping on the crystal structure and magnetic properties of ni sub 2 sub in type mncoge sub 1 x sub la sub x sub x 0 0 01 0 03 alloys |
| topic | MnCoGe alloy rare earth doping Rietveld full spectrum fitting crystal structure magnetic properties |
| url | https://www.mdpi.com/1996-1944/14/14/3998 |
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