Structure and Magnetism of Co2Ge Nanoparticles
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Crystal Structure and Microstructure Measurements
3.2. Magnetic Properties
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
- Gambardella, P.; Rusponi, S.; Veronese, M.; Dhesi, S.S.; Grazioli, C.; Dallmeyer, A.; Cabria, I.; Zeller, R.; Dederichs, P.H.; Kern, K. Giant Magnetic Anisotropy of Single Cobalt Atoms and Nanoparticles. Science 2003, 300, 1130–1133. [Google Scholar] [CrossRef] [PubMed] [Green Version]
- Dugay, J.; Tan, R.P.; Meffre, A.; Blon, T.; Lacroix, L.-M.; Carrey, J.; Fazzini, P.F.; Lachaize, S.; Chaudret, B.; Respaud, M. Room-Temperature Tunnel Magnetoresistance in Self-Assembled Chemically Synthesized Metallic Iron Nanoparticles. Nano Lett. 2011, 11, 5128–5134. [Google Scholar] [CrossRef] [PubMed]
- Das, B.; Balasubramanian, B.; Manchanda, P.; Mukherjee, P.; Skomski, R.; Hadjipanayis, G.C.; Sellmyer, D.J. Mn5Si3 Nanoparticles: Synthesis and Size-Induced Ferromagnetism. Nano Lett. 2016, 2, 1132–1137. [Google Scholar] [CrossRef] [PubMed]
- Croitoru, M.D.; Shanenko, A.A.; Vagov, A.; Vasenko, A.S.; Milošević, M.V.; Axt, V.M.; Peeters, F.M. Influence of Disorder on Superconducting Correlations in Nanoparticles. J. Supercond. Nov. Magn. 2016, 29, 605–609. [Google Scholar] [CrossRef]
- Tosun, O.; Salehi-Fashami, M.; Balasubramanian, B.; Skomski, R.; Sellmyer, D.J.; Hadjipanayis, G.C. Structure and Magnetism of Mn5Ge3 Nanoparticles. Nanomaterials 2018, 8, 241. [Google Scholar] [CrossRef] [PubMed]
- Das, B.; Balasubramanian, B.; Skomski, R.; Mukherjee, P.; Valloppilly, S.R.; Hadjipanayis, G.C.; Sellmyer, D.J. Effect of size confinement on skyrmionic properties of MnSi nanomagnets. Nanoscale 2018, 10, 9504–9508. [Google Scholar] [CrossRef] [PubMed]
- Strnat, K.J. Rare-Earth Magnets in Present Production and Development. J. Magn. Magn. Mater. 1978, 7, 351–360. [Google Scholar] [CrossRef]
- Skomski, R.; Coey, J.M.D. Permanent Magnetism; Institute of Physics Publishing: Bristol, UK; Philadelphia, PA, USA, 1999. [Google Scholar]
- Duerrschnabel, M.; Yi, M.; Uestuener, K.; Liesegang, M.; Katter, M.; Kleebe, H.-J.; Xu, B.; Gutfleisch, O.; Molina-Luna, L. Atomic structure and domain wall pinning in samarium-cobalt-based permanent magnets. Nat. Commun. 2017, 8, 54. [Google Scholar] [CrossRef] [PubMed]
- Komatsu, T.; Fukui, M.; Yashima, T. Cobalt intermetallic compounds for selective hydrogenation of acetylene. Stud. Surf. Sci. Catal. 1996, 101, 1095–1104. [Google Scholar] [CrossRef]
- Xu, Y.; Lausche, A.C.; Wang, S.; Khan, T.S.; Abild-Pedersen, F.; Studt, F.; Nørskov, J.K.; Bligaard, T. In silico search for novel methane steam reforming catalysts. New J. Phys. 2013, 15, 125021. [Google Scholar] [CrossRef]
- Pfau, A.J. Characterization of CoGe Thin Films and Powders. Ph.D. Thesis, Oregon State University, Corvallis, OR, USA, 6 December 2016. [Google Scholar]
- Lee, C.; Wilson, I.; Cheung, W.; Chen, Y.; Xu, J.; Wong, S. Ion beam synthesized cobalt germanide alloy by metal vapor vacuum arc implantation. Nucl. Instrum. Methods Phys. Res. Sect. B Beam Interact. Mater. At. 1999, 148, 604–609. [Google Scholar] [CrossRef]
- Takizawa, H.; Sato, T.; Endo, T.; Shimada, M. High pressure synthesis and electrical and magnetic properties of MnGe4 and CoGe4. J. Solid State Chem. 1990, 88, 384–390. [Google Scholar] [CrossRef]
- Balasubramanian, B.; Manchanda, P.; Skomski, R.; Mukherjee, P.; Das, B.; George, T.A.; Hadjipanayis, G.C.; Sellmyer, D.J. Unusual spin correlations in a nanomagnet. Appl. Phys. Lett. 2015, 106, 242401. [Google Scholar] [CrossRef] [Green Version]
- Skomski, R.; Kumar, P.; Balasubramanian, B.; Das, B.; Manchanda, P.; Raghani, R.; Kashyap, A.; Sellmyer, D.J. Exchange and magnetic order in bulk and nanostructured Fe5Si3. J. Magn. Magn. Mater. 2018, 460, 438–447. [Google Scholar] [CrossRef]
- Balasubramanian, B.; Manchanda, P.; Skomski, R.; Mukherjee, P.; Valloppilly, S.R.; Das, B.; Hadjipanayis, G.C.; Sellmyer, D.J. High-coercivity magnetism in nanostructures with strong easy-plane anisotropy. Appl. Phys. Lett. 2016, 108, 152406. [Google Scholar] [CrossRef] [Green Version]
- Zhou, G.F.; Bakker, H. Amorphization and magnetic properties of Co2Ge during mechanical milling. Phys. Rev. B 1993, 48, 13383–13398. [Google Scholar] [CrossRef] [PubMed]
- Tosun, O.; Balasubramanian, B.; Skomski, R.; Sellmyer, D.J.; Hadjipanayis, G.C. Magnetic and Structural Properties of Melt-Spun Co-Ge Ribbons. J. Magn. Magn. Mater. 2019. under review. [Google Scholar]
- Panday, P.K.; Schubert, K. Investigation of Structures in Some T-B3-B4 Alloys (T = Mn, Fe, Co, Ir, Ni, Pd, B3-Al, Ga, Tl, B4-Si, Ge). J. Less Common Met. 1969, 18, 175–202. [Google Scholar] [CrossRef]
- Ellner, M. Über die kristallchemischen pramater der Ni-, Co- und Fe-haltigen phasen vom NiAs-Typ. J. Less Common Met. 1976, 48, 21–52. [Google Scholar] [CrossRef]
- PowderCell 2.3 Powder Pattern Calculation from Single Crystal Data and Refinement of Experimental Curves. Available online: http://www.ccp14.ac.uk (accessed on 31 August 2019).
- Kneller, E.; Seeger, A.; Kronmüller, H. Ferromagnetism; Springer: Berlin/Heidelberg, Germany, 1962; pp. 151–152. [Google Scholar]
- Hadjipanayis, G.; Sellmyer, D.J.; Brandt, B. Rare-earth-rich metallic glasses. I. Magnetic hysteresis. Phys. Rev. B 1981, 23, 3349–3354. [Google Scholar] [CrossRef] [Green Version]
Sample | HP (%) | OP (%) | HP Lattice Parameters (Å) | HP c/a | OP Lattice Parameters (Å) | OP c/a | OP c/b |
---|---|---|---|---|---|---|---|
As-made | 27 | 73 | a = 3.8777 c = 4.9748 | 1.28 (1) | a = 5.0134 b = 3.8209 c = 7.2586 | 1.43 (1) | 1.86 (1) |
Annealed | 2 | 98 | -------- | -------- | a = 5.0279 b = 3.8235 c = 7.2504 | 1.4420 | 1.8962 |
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Tosun, O.; Abel, F.M.; Balasubramanian, B.; Skomski, R.; Sellmyer, D.J.; Hadjipanayis, G.C. Structure and Magnetism of Co2Ge Nanoparticles. Nanomaterials 2019, 9, 1371. https://doi.org/10.3390/nano9101371
Tosun O, Abel FM, Balasubramanian B, Skomski R, Sellmyer DJ, Hadjipanayis GC. Structure and Magnetism of Co2Ge Nanoparticles. Nanomaterials. 2019; 9(10):1371. https://doi.org/10.3390/nano9101371
Chicago/Turabian StyleTosun, Onur, Frank M. Abel, Balamurugan Balasubramanian, Ralph Skomski, David J. Sellmyer, and George C. Hadjipanayis. 2019. "Structure and Magnetism of Co2Ge Nanoparticles" Nanomaterials 9, no. 10: 1371. https://doi.org/10.3390/nano9101371