Investigating the Cause of Quantum Phase Transition in Gd Intermetallic Compounds
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- 作者：N. Kamali Sarverstani ; A. Yazdani…
- 关键词：Quantum phase transition ; Conduction electron ; Correlation length ; Exchange energy
- 刊名：Journal of Superconductivity Incorporating Novel Magnetism
- 出版年：2015
- 出版时间：March 2015
- 年：2015
- 卷：28
- 期：3
- 页码：1003-1006
- 全文大小：363 KB
- 参考文献：1. Severin, L, Johansson, B, Brooks, MSS (1992) Mechanisms for itinerant magnetism in intermetallic compounds. J. M. M. M. 104-07: pp. 745-746 CrossRef
2. Si, Q, Rabello, S (2001) Locally critical quantum phase transitions in strongly correlated metals. Nature 413: pp. 804-880 CrossRef
3. Shidlovsky, AA, Wallace, WE (1970) Magnetic and crystallographic characteristics of the ternary intermetallic compounds containing lanthanides and iron or cobalt. J. Solid State Chem. 2: pp. 193-198 CrossRef
4. Kittel, C (1996) Introduction to solid state physics. Wiley, New York
5. Bredimas, V, Gamari-seale, H, Papatriantafillou, C (1984) The magnetic behavior of the pseudobinary compounds Gd2AuxAl1?x. Phys. State. Sol. (b) 122: pp. 527-534 CrossRef
6. Oesterreicher, H (1977) Magnetic properties of Gd2Al. Phys. State Sol. (a) 39: pp. k91-k93 CrossRef
7. Li, XG, Sato, M, Takahashi, S, Aoki, K, Masumoto, T (2000) Magnetic properties of Gd2Al compound in amorphous, crystalline and nitrided states. J. M. M. M. 212: pp. 145-152 CrossRef
8. Sarvestani, KN (2014) A puzzle of quantum phase transition on Gd-IMC by tuning of conduction electron concentration. J. Chem. Chem. Eng. 8: pp. 92-96
9. Sill, LR, Biggers, RR (1978) Magnetic characteristics of R2Al and R2Au compounds. J. Appl. Phys. 46: pp. 1500 CrossRef
10. Yazdani, A, Gardner, JSt (1998) Stabilization of reentrance AFM on Gd2Al system in a certain electron concentration. Phys. State. Sol. (b) 209: pp. 465-472 CrossRef
11. Blaha, P, Schwarz, K, Madsen, GKH, Kvasnicka, D, Luitz, J (2001) WIEN2K, an augmented plane wave + local orbitals program for calculating crystal properties. Karlheinz Schwarz, Techn. Universitat, Wien - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Superconductivity, Superfluidity and Quantum Fluids
Magnetism and Magnetic Materials
Condensed Matter
Characterization and Evaluation Materials - 出版者：Springer New York
- ISSN：1557-1947
文摘
Quantum phase transition (QPT), a consequence of quantum critical point (QCP), was considered for the suppression of unstable double phase transition of Gd intermetallic compounds to the paramagnetic state, despite the lack of both hybridization and crystal field effect (CFE) which are fundamental in the existence of QCP. The phenomenon is supposed to be due to the exchange fluctuation character in terms of competition between exchange and kinetic energies of conduction electrons (c.e) during the strong spin-induced polarization of c.e defined by DFT calculations. All electronic structure calculations in this work were carried out by WIEN2K package in the framework of PBE approximation. We found evidences on the tuning of K F in direction to shift the topological magnetic ions to minimize the correlation length R C =2K F R i j at the critical point. At this point, the system is close to the critical value near the double ferromagnetic-antiferromagnetic percolation threshold. Experiment shows that the broad dynamic instability of the Curie temperature can lead the sample behavior to the antiferromagnetic state by induced stress motion due to the sample shape (powder to needle) and to the paramagnetic state by imposing magnetic field. The calculated cohesive energy implies that the exchange energy can adopt the magneto-crystalline system as a more stable symmetrical configuration by developing much more negative cohesive energy depending on the yttrium compound in direction to reduce the bulk modulus, which results in the vanishing of antiferromagnetic ordering. We found evidences on the quantum phase (QP) coherence of the Fermi wave vector λ F, which contributes to the shear stress σ in direction to stabilize both magnetic and crystalline structures in the paramagnetic state.