This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1063/1.4896399 in citations.
Please use the identifier: http://hdl.handle.net/2128/16807 in citations.
Magnetization-steps in Y$_{2}$CoMnO$_{6}$ double perovskite: The role of antisite disorder
Magnetization-steps in Y$_{2}$CoMnO$_{6}$ double perovskite: The role of antisite disorder
Antisite disorder is observed to have significant impact on the magnetic properties of the double perovskite Y2CoMnO6 which has been recently identified as a multiferroic. A paramagnetic-ferromagnetic phase transition occurs in this material at Tc ≈ 75 K. At 2 K, it displays a strong ferromagnetic h...
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Personal Name(s): | Pradheesh, R. |
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Xiao, Yinguo / Cherian, Dona / Elizabeth, Suja / Hansen, Thomas / Chatterji, Tapan / Brückel, Th. / Nair, Harikrishnan (Corresponding Author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JARA-FIT; JARA-FIT Streumethoden; PGI-4 |
Published in: | Journal of applied physics, 116 (2014) 12, S. 123907 |
Imprint: |
Melville, NY
American Inst. of Physics
2014
|
DOI: |
10.1063/1.4896399 |
Document Type: |
Journal Article |
Research Program: |
JCNS In-house Research with PNI Neutrons Exploratory materials and phenomena Spin-based and quantum information |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/16807 in citations.
Antisite disorder is observed to have significant impact on the magnetic properties of the double perovskite Y2CoMnO6 which has been recently identified as a multiferroic. A paramagnetic-ferromagnetic phase transition occurs in this material at Tc ≈ 75 K. At 2 K, it displays a strong ferromagnetic hysteresis with a significant coercive field of Hc ≈ 15 kOe. Sharp steps are observed in the hysteresis curves recorded below 8 K. In the temperature range 2 K ≤ T ≤ 5 K, the hysteresis loops are anomalous as the virgin curve lies outside the main loop. The field-cooling conditions as well as the rate of field-sweep are found to influence the steps. Quantitative analysis of the neutron diffraction data shows that at room temperature, Y2CoMnO6 consists of 62% of monoclinic P21/n with nearly 70% antisite disorder and 38% Pnma. The bond valence sums indicate the presence of other valence states for Co and Mn which arise from disorder. We explain the origin of steps by using a model for pinning of magnetization at the antiphase boundaries created by antisite disorder. The steps in magnetization closely resemble the martensitic transformations found in intermetallics and display first-order characteristics as revealed in the Arrott's plots. |