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Helical Magnetism in Sr-Doped CaMn7O12 Films

Published

Author(s)

Amanda Huon, Anuradha M. Vibhakar, Alexander J Grutter, Julie A. Borchers, Steven Disseler, Yaohua Liu, Wei Tian, Fabio Orlandi, Pascal Manuel, Dmitry D. Khalyavin, Yogesh Sharma, Andreas Herklotz, Ho Nyung Lee, Michael R. Fitzsimmons, Roger D. Johnson, Steven J. May

Abstract

Noncollinear magnetism can play an important role in multiferroic materials but is relatively understudied in oxide heterostructures compared to their bulk counterparts. Using magnetometry and neutron diffraction, we demonstrate the presence of helical magnetic ordering in CaMn7O12 and Ca1-xSrxMn7O12 (for x up to 0.51) thin films. Consistent with bulk Ca1-xSrxMn7O^d12, the net magnetization increases with Sr doping. Neutron diffraction confirms that the helical magnetic structure remains incommensurate at all values of x, while the fundamental magnetic wavevector increases upon Sr substitution. This result demonstrates a chemical-based approach for tuning helical magnetism in quadruple perovskite films and enables future studies of strain and interfacial effects on helimagnetism in oxide heterostructures.
Citation
Physical Review B
Volume
98
Issue
22

Keywords

Neutron diffraction, Helical magnetic order, Magnetic transitions, Magnetic oxide, Polarized neutron beam, Thin Film

Citation

Huon, A. , , A. , , A. , , J. , Disseler, S. , Liu, Y. , Tian, W. , Orlandi, F. , Manuel, P. , , D. , Sharma, Y. , Herklotz, A. , , H. , , M. , , R. and , S. (2018), Helical Magnetism in Sr-Doped CaMn<sub>7</sub>O<sub>12</sub> Films, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926693 (Accessed July 31, 2021)
Created December 19, 2018, Updated October 9, 2019