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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Doping-induced quantum crossover in Er2Ti2-xSnxO7

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Shirai, M. [1, 2] ; Freitas, R. S. [3] ; Lago, J. [4] ; Bramwell, S. T. [1, 2] ; Ritter, C. [5] ; Zivkovic, I. [6]
Total Authors: 6
[1] UCL, London Ctr Nanotechnol, 17-19 Gordon, London WC1H 0AJ - England
[2] UCL, Dept Phys & Astron, 17-19 Gordon, London WC1H 0AJ - England
[3] Univ Sao Paulo, Inst Fis, CP 66318, BR-05314970 Sao Paulo, SP - Brazil
[4] Univ Basque Country, UPV EHU, Dept Inorgan Chem, E-48080 Bilbao - Spain
[5] Inst Laue Langevin, Boite Postale 156X, F-38042 Grenoble 9 - France
[6] Ecole Polytech Fed Lausanne, Inst Phys, Lab Quantum Magnetism, CH-1015 Lausanne - Switzerland
Total Affiliations: 6
Document type: Journal article
Source: Physical Review B; v. 96, n. 18 NOV 20 2017.
Web of Science Citations: 2

We present the results of the investigation of magnetic properties of the Er2Ti2-xSnxO7 series. For small doping values, the ordering temperature decreases linearly with x, while the moment configuration remains the same as in the x = 0 parent compound. Around x = 1.7 doping level, we observe a change in the behavior, where the ordering temperature starts to increase and new magnetic Bragg peaks appear. For the first time, we present evidence of a long-range order (LRO) in Er2Sn2O7 (x = 2.0) below T-N = 130 mK. It is revealed that the moment configuration corresponds to a Palmer-Chalker type with a value of the magnetic moment significantly renormalized compared to x = 0. We discuss our results in the framework of a possible quantum phase transition occurring close to x = 1.7. (AU)

FAPESP's process: 15/16191-5 - The research in new materials involving high magnetic fields and low temperatures
Grantee:Gennady Gusev
Support type: Research Projects - Thematic Grants