Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2
Abstract
Identifying and characterizing systems with coupled and competing interactions is central to the development of physical models that can accurately describe and predict emergent behavior in condensed matter systems. This work demonstrates that the metallic compound CuFe2Ge2 has competing magnetic ground states, which are shown to be strongly coupled to the lattice and easily manipulated using temperature and applied magnetic fields. The temperature-dependent magnetization M measurements reveal a ferromagnetic-like onset at 228 (1) K and a broad maximum in M near 180 K. Powder neutron diffraction confirms antiferromagnetic ordering below TN ≈ 175 K, and an incommensurate spin density wave is observed below ≈125 K. Coupled with the small refined moments (0.5–1 μB/Fe), this provides a picture of itinerant magnetism in CuFe2Ge2. Furthermore, the neutron diffraction data reveal a coexistence of two magnetic phases that further highlights the near-degeneracy of various magnetic states. Our results demonstrate that the ground state in CuFe2Ge2 can be easily manipulated by external forces, making it of particular interest for doping, pressure, and further theoretical studies.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1329756
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
May, Andrew F., Calder, Stuart, Parker, David S., Sales, Brian C., and McGuire, Michael A. Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2. United States: N. p., 2016.
Web. doi:10.1038/srep35325.
May, Andrew F., Calder, Stuart, Parker, David S., Sales, Brian C., & McGuire, Michael A. Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2. United States. https://doi.org/10.1038/srep35325
May, Andrew F., Calder, Stuart, Parker, David S., Sales, Brian C., and McGuire, Michael A. Fri .
"Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2". United States. https://doi.org/10.1038/srep35325. https://www.osti.gov/servlets/purl/1329756.
@article{osti_1329756,
title = {Competing magnetic ground states and their coupling to the crystal lattice in CuFe2Ge2},
author = {May, Andrew F. and Calder, Stuart and Parker, David S. and Sales, Brian C. and McGuire, Michael A.},
abstractNote = {Identifying and characterizing systems with coupled and competing interactions is central to the development of physical models that can accurately describe and predict emergent behavior in condensed matter systems. This work demonstrates that the metallic compound CuFe2Ge2 has competing magnetic ground states, which are shown to be strongly coupled to the lattice and easily manipulated using temperature and applied magnetic fields. The temperature-dependent magnetization M measurements reveal a ferromagnetic-like onset at 228 (1) K and a broad maximum in M near 180 K. Powder neutron diffraction confirms antiferromagnetic ordering below TN ≈ 175 K, and an incommensurate spin density wave is observed below ≈125 K. Coupled with the small refined moments (0.5–1 μB/Fe), this provides a picture of itinerant magnetism in CuFe2Ge2. Furthermore, the neutron diffraction data reveal a coexistence of two magnetic phases that further highlights the near-degeneracy of various magnetic states. Our results demonstrate that the ground state in CuFe2Ge2 can be easily manipulated by external forces, making it of particular interest for doping, pressure, and further theoretical studies.},
doi = {10.1038/srep35325},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Fri Oct 14 00:00:00 EDT 2016},
month = {Fri Oct 14 00:00:00 EDT 2016}
}
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Works referenced in this record:
Re-examination of the symmetries of iron and nickel by the powder method
journal, May 1954
- von Batchelder, F. W.; Raeuchle, R. F.
- Acta Crystallographica, Vol. 7, Issue 5
On the first-order incommensurate-commensurate phase transition of CrMn single crystals
journal, August 1982
- Geerken, B. M.; Griessen, R.; Benediktsson, G.
- Journal of Physics F: Metal Physics, Vol. 12, Issue 8
Complexity in Strongly Correlated Electronic Systems
journal, July 2005
- Dagotto, E.
- Science, Vol. 309, Issue 5732
Itinerant Magnetism in Metallic CuFe2Ge2
journal, March 2015
- Shanavas, K. V.; Singh, David J.
- PLOS ONE, Vol. 10, Issue 3
Spin-density-wave anomaly at 140 K in the ternary iron arsenide
journal, July 2008
- Rotter, Marianne; Tegel, Marcus; Johrendt, Dirk
- Physical Review B, Vol. 78, Issue 2
Electronic structure of Fe-based superconductors
journal, May 2009
- Singh, D. J.
- Physica C: Superconductivity, Vol. 469, Issue 9-12
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides
journal, October 2010
- Johnston, David C.
- Advances in Physics, Vol. 59, Issue 6
Free energy and phase diagram of chromium alloys
journal, August 1993
- Fishman, R. S.; Liu, S. H.
- Physical Review B, Vol. 48, Issue 6
Electron-Hole Symmetry and Magnetic Coupling in Antiferromagnetic LaFeAsO
journal, July 2008
- Yin, Z. P.; Lebègue, S.; Han, M. J.
- Physical Review Letters, Vol. 101, Issue 4
Role of covalent Fe-As bonding in the magnetic moment formation and exchange mechanisms in iron-pnictide superconductors
journal, December 2008
- Belashchenko, K. D.; Antropov, V. P.
- Physical Review B, Vol. 78, Issue 21
Recent advances in magnetic structure determination by neutron powder diffraction
journal, October 1993
- Rodríguez-Carvajal, Juan
- Physica B: Condensed Matter, Vol. 192, Issue 1-2
A new protocol for the determination of magnetic structures using simulated annealing and representational analysis (SARAh)
journal, March 2000
- Wills, A. S.
- Physica B: Condensed Matter, Vol. 276-278
Generalized Gradient Approximation Made Simple
journal, October 1996
- Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
- Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
Magnetocrystalline anisotropy in and related Mn-based actinide ferromagnets
journal, May 2015
- Parker, David S.; Ghimire, Nirmal; Singleton, John
- Physical Review B, Vol. 91, Issue 17
First-principles calculation of the magnetocrystalline anisotropy energy of iron, cobalt, and nickel
journal, June 1990
- Daalderop, G. H. O.; Kelly, P. J.; Schuurmans, M. F. H.
- Physical Review B, Vol. 41, Issue 17
Electronic structure of Fe-based superconductors
journal, May 2015
- Maiti, Kalobaran
- Pramana, Vol. 84, Issue 6
Role of covalent Fe-As bonding in the magnetic moment formation and exchange mechanisms in iron-pnictide superconductors
text, January 2008
- Belashchenko, K. D.; Antropov, V. P.
- arXiv
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