Direct evidence of anomalous interfacial magnetization in metamagnetic Pd doped FeRh thin films

Bennett, S. P.; Ambaye, H.; Lee, H.; LeClair, P.; Mankey, G. J.; Lauter, V.

doi:10.1038/srep09142

Direct evidence of anomalous interfacial magnetization in metamagnetic Pd doped FeRh thin films

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep09142· OSTI ID:1259694

Bennett, S. P. ^[1]; Ambaye, H. ^[2]; Lee, H. ^[3]; LeClair, P. ^[3]; Mankey, G. J. ^[3]; Lauter, V. ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Research Accelerator Division
Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy

Palladium doped iron rhodium is a magnetic material of significant interest for it’s close to room temperature magnetostructural phase transition from antiferromagnetic (AF) to ferromagnetic (FM) ordering. Here we report on the peculiarities of the magnetization distribution in thin films of FeRh(Pd) probed by Polarized Neutron Reflectometry. Remarkably, we’ve found thin interfacial regions with strong magnetization that have unique thermomagnetic properties as compared to the rest of the system. These regions exist at the top and bottom interfaces of the films while the central regions behave similarly to the bulk with a clear AF-FM order transition. Further we explore the impact of an additional Pt interlayer introduced in the middle of the FeRh(Pd) film and reveal that it serves to replicate the strong interfacial magnetization found at the top and bottom interfaces. In conclusion, these results are of great value both in understanding the fundamental physics of such an order transition, and in considering FeRh(Pd) for magnetic media and spintronics applications.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC05-00OR22725; FG02-08ER46499

OSTI ID:: 1259694

Alternate ID(s):: OSTI ID: 1261419

Journal Information:: Scientific Reports, Journal Name: Scientific Reports Vol. 5; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Inhomogeneous spatial distribution of the magnetic transition in an iron-rhodium thin film Gatel, C.; Warot-Fonrose, B.; Biziere, N. Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/ncomms15703	journal	June 2017
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Strain-tuning of the magnetocaloric transition temperature in model FeRh films Loving, M. G.; Barua, R.; Le Graët, C. Journal of Physics D: Applied Physics, Vol. 51, Issue 2 https://doi.org/10.1088/1361-6463/aa9d1f	journal	December 2017
Self-consistent local mean-field theory for phase transitions and magnetic properties of FeRh McGrath, Brianne R.; Camley, Robert E.; Livesey, Karen L. Physical Review B, Vol. 101, Issue 1 https://doi.org/10.1103/physrevb.101.014444	journal	January 2020
Modeling the thickness dependence of the magnetic phase transition temperature in thin FeRh films Ostler, Thomas Andrew; Barton, Craig; Thomson, Thomas Physical Review B, Vol. 95, Issue 6 https://doi.org/10.1103/physrevb.95.064415	journal	February 2017
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