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Disseler SM, Chen Y, Yeo S, Gasparovic G, Piccoli PMB, Schultz AJ, Qiu Y, Huang Q, Cheong SW, Ratcliff W. One Dimensional(1D)-to-2D Crossover of Spin Correlations in the 3D Magnet ZnMn2O4. Sci Rep 2015; 5:17771. [PMID: 26644220 PMCID: PMC4672353 DOI: 10.1038/srep17771] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 11/04/2015] [Indexed: 11/22/2022] Open
Abstract
We report on the intriguing evolution of the dynamical spin correlations of the frustrated spinel ZnMn2O4. Inelastic neutron scattering and magnetization studies reveal that the dynamical correlations at high temperatures are 1D. At lower temperature, these dynamical correlations become 2D. Surprisingly, the dynamical correlations condense into a quasi 2D Ising-like ordered state, making this a rare observation of two dimensional order on the spinel lattice. Remarkably, 3D ordering is not observed down to temperatures as low as 300 mK. This unprecedented dimensional crossover stems from frustrated exchange couplings due to the huge Jahn-Teller distortions around Mn3+ ions on the spinel lattice.
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Affiliation(s)
- S M Disseler
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - Y Chen
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899.,Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742
| | - S Yeo
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854.,Korea Atomic Energy Research Institute, Daejeon, Korea
| | - G Gasparovic
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899.,Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742
| | - P M B Piccoli
- Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439
| | - A J Schultz
- Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439
| | - Y Qiu
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899.,Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742
| | - Q Huang
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
| | - S-W Cheong
- Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854
| | - W Ratcliff
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Bera AK, Yusuf SM, Mirebeau I. Effect of electron doping on the magnetic correlations in the bilayered brownmillerite compound Ca(2.5-x)La(x)Sr(0.5)GaMn2O8: a neutron diffraction study. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2011; 23:426005. [PMID: 21983174 DOI: 10.1088/0953-8984/23/42/426005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effect of electron doping on the magnetic properties of the brownmillerite type bilayered compounds has been investigated by neutron powder diffraction in La substituted Ca(2.5-x)La(x)Sr(0.5)GaMn(2)O(8) compounds (x = 0.05 and 0.1), in comparison with the undoped compound (x = 0). In all compounds, a long-range three-dimensional collinear antiferromagnetic (AFM) structure is found below the Néel temperature T(N) of the respective compound, whereas, well above T(N), three-dimensional short-range magnetic ordering is observed. In the intermediate temperature range just above T(N), a strong effect of electron doping (La substitution) on the magnetic correlations has been observed. Here, a short-range AFM correlation with a possible dimensionality of three has been found for substituted compounds (x = 0.05 and 0.1) as compared to the reported two-dimensional long-range AFM ordering in the parent compound. With increasing electron doping, a decrease in T(N) is also observed. The short-range magnetic correlations set in over a large temperature range above T(N). A magnetic phase diagram in the x-T plane is proposed from these results.
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Affiliation(s)
- A K Bera
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
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Wu W, Kiryukhin V, Noh HJ, Ko KT, Park JH, Ratcliff W, Sharma PA, Harrison N, Choi YJ, Horibe Y, Lee S, Park S, Yi HT, Zhang CL, Cheong SW. Formation of pancakelike Ising domains and giant magnetic coercivity in ferrimagnetic LuFe2O4. PHYSICAL REVIEW LETTERS 2008; 101:137203. [PMID: 18851488 DOI: 10.1103/physrevlett.101.137203] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Indexed: 05/26/2023]
Abstract
We have studied quasi-two-dimensional multiferroic LuFe2O4 with strong charge-spin-lattice coupling, in which low-temperature coercivity approaches an extraordinary value of 9 T in single crystals. The enhancement of the coercivity is connected to the collective freezing of nanoscale pancakelike ferrimagnetic domains with large uniaxial magnetic anisotropy ("Ising pancakes"). Our results suggest that collective freezing in low-dimensional magnets with large uniaxial anisotropy provides an effective mechanism to achieve enhanced coercivity. This observation may help identify novel approaches for synthesis of magnets with enhanced properties.
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Affiliation(s)
- Weida Wu
- Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, USA.
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Borchers JA, Gehring PM, Erwin RW, Ankner JF, Majkrzak CF, Hylton TL, Coffey KR, Parker MA, Howard JK. Antiferromagnetic interlayer correlations in annealed Ni80Fe20/Ag multilayers. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:9870-9882. [PMID: 9984722 DOI: 10.1103/physrevb.54.9870] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wu SY, Li W, Lee KC, Lynn JW, Meen TH, Yang HD. Two- and three-dimensional magnetic correlations of Tb in Pb2Sr2TbCu3O8. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:10019-10026. [PMID: 9984739 DOI: 10.1103/physrevb.54.10019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Staub U, Ritter C. Two-dimensional spin fluctuations of Ho3+ in HoBa2Cu3O7. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:7279-7283. [PMID: 9984349 DOI: 10.1103/physrevb.54.7279] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Aminov L, Malkin B, Teplov M. Chapter 150 Magnetic properties of nonmetallic lanthanide compounds. HANDBOOK ON THE PHYSICS AND CHEMISTRY OF RARE EARTHS 1996. [DOI: 10.1016/s0168-1273(96)22007-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Rosov N, Lynn JW, Radousky HB, Bennahmias M, Goodwin TJ, Klavins P, Shelton RN. Crystal structure and magnetic ordering of the rare-earth and Cu moments in RBa2Cu2NbO8 (R=Nd,Pr). PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:15256-15264. [PMID: 10005899 DOI: 10.1103/physrevb.47.15256] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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