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Title: Chiral magnetic excitations in FeGe films

Authors:
; ; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1351667
Grant/Contract Number:
SC0012245
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 13; Related Information: CHORUS Timestamp: 2017-04-12 22:11:14; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Turgut, Emrah, Park, Albert, Nguyen, Kayla, Moehle, Austin, Muller, David A., and Fuchs, Gregory D. Chiral magnetic excitations in FeGe films. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.134416.
Turgut, Emrah, Park, Albert, Nguyen, Kayla, Moehle, Austin, Muller, David A., & Fuchs, Gregory D. Chiral magnetic excitations in FeGe films. United States. doi:10.1103/PhysRevB.95.134416.
Turgut, Emrah, Park, Albert, Nguyen, Kayla, Moehle, Austin, Muller, David A., and Fuchs, Gregory D. Wed . "Chiral magnetic excitations in FeGe films". United States. doi:10.1103/PhysRevB.95.134416.
@article{osti_1351667,
title = {Chiral magnetic excitations in FeGe films},
author = {Turgut, Emrah and Park, Albert and Nguyen, Kayla and Moehle, Austin and Muller, David A. and Fuchs, Gregory D.},
abstractNote = {},
doi = {10.1103/PhysRevB.95.134416},
journal = {Physical Review B},
number = 13,
volume = 95,
place = {United States},
year = {Wed Apr 12 00:00:00 EDT 2017},
month = {Wed Apr 12 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.95.134416

Citation Metrics:
Cited by: 2works
Citation information provided by
Web of Science

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  • The interface magnetism between Co{sub 2}FeGe Heusler alloy layers and MgO layers was investigated using {sup 57}Fe Mössbauer spectroscopy. Interface-sensitive samples, where the {sup 57}Fe isotope was used only for the interfacial atomic layer of the Co{sub 2}FeGe layer on the MgO layer, were prepared using atomically controlled alternate deposition. The {sup 57}Fe Mössbauer spectra of the interface-sensitive samples at room temperature were found similar to those of the bulk-sensitive Co{sub 2}FeGe films in which the {sup 57}Fe isotope was distributed throughout the films. On the other hand, the tunnel magnetoresistance effect of magnetic tunnel junctions with Co{sub 2}FeGe layersmore » as the ferromagnetic electrodes showed strong reduction at room temperature. These results indicate that the strong temperature dependence of the tunneling magnetoresistance of magnetic tunnel junctions using Heusler alloy electrodes cannot be attributed simply to the reduction of the magnetization at the interfaces between the Heusler alloy and insulator layers.« less
  • The authors demonstrated that a full-Heusler Co{sub 2}FeGe (CFG) alloy thin film was epitaxially grown by rapid-thermal-annealing-induced germanidation of an Fe/Co/pseudo-Ge(001)-on-insulator (GOI) multilayer formed on a Si-on-insulator (SOI) substrate. X-ray diffraction (XRD) measurements with out-of-plane and in-plane configurations revealed that the CFG film was epitaxially grown along the [001] direction with the in-plane epitaxial relation of CFG[100] parallel GOI[100], although the film slightly contained a non-epitaxial component. The strong (111) and (200) superlattice diffraction intensities indicated that the CFG film had a high degree of order for the L2{sub 1} structure. Cross-sectional high-resolution transmission electron microscopy images of the filmmore » revealed that the film had dominant epitaxial and slight non-epitaxial components, which was consistent with the XRD measurements. The epitaxial component was grown directly on the buried oxide layer of the SOI substrate without formation of any interfacial layer.« less
  • A neutron study of the tetragonal antiferromagnet FeGe/sub 2/ has shown the existence of two continuous magnetic transitions at temperatures of approx.263 and approx.289 K. The upper temperature corresponds to a transition from paramagnetism to a basal-plane spiral structure propagating along the cell edges in that plane. At the lower temperature the spiral structure is transformed into the simple collinear structure previously reported in the literature. Typical critical behavior is observed at the upper temperature for individual satellite peaks. The spiral propagation vector decreases continuously to zero at the lower critical point, exhibiting power-law behavior with an exponent of 0.40/submore » 7/ +- 0.005. Heat-capacity measurements reveal two lambda-type anomalies with critical exponents in the expected range. The phase diagram has been analyzed using mean-field and renormalization-group considerations. A model based on zero basal-plane spin anisotropy yields a magnetic structure which agrees with the observed structure of the intermediate phase. The effect of an external field has also been treated theoretically.« less
  • Magnetic phase of FeGe{sub 2} intermetallic is studied using low-temperature neutron diffraction and DC magnetization. Zero-magnetic-field neutron scattering data shows the presence of an antiferromagnetic phase in the low temperature range. We find the evidence of the presence of a ferromagnetic order overriding on the predominantly antiferromagnetic phase at low temperatures.