Local increase of the Curie temperature in Mn/Fe implanted Y3Fe5O12 (YIG)

P. B. Krastev*, H. P. Gunnlaugsson, K. Nomura, K. Bharuth-Ram, B. Qi, H. Masenda, T. E. Mølholt, D. Naidoo, S. Ólafsson, A. Tarazaga Martín-Luengo, I. Unzueta, K. Johnston, J. Schell, H. P. Gislason

*Fyrsti höfundur fyrir þetta verk

Rannsóknarafurð: Framlag til fræðitímaritsGreinritrýni

3 Tilvitnanir (Scopus)

Útdráttur

The change in the Curie temperature of single crystalline garnet Y3Fe5O12 (YIG) sample due to lattice damage induced by ion implantation has been investigated in 57Fe emission Mössbauer Spectroscopy (eMS) following implantation of 57Mn (T½ = 1.5 min). The Mössbauer spectra analysis reveal high spin Fe3+ ions substituted on both the octahedral and the tetrahedral sites. Measurements in the temperature range 298 K–798 K show that average values of the magnetic hyperfine field are decreased by the implantation-induced damage on the local lattice structure of the YIG. The Curie temperature, however, is determined to be 651 ± 5 K, considerably higher than the value of bulk YIG (559 K). This is most likely due to lattice damage-induced changes on the spin configurations of YIG through a FeA-O-FeD distortion scheme.

Upprunalegt tungumálEnska
Númer greinar109121
FræðitímaritApplied Radiation and Isotopes
Bindi160
DOI
ÚtgáfustaðaÚtgefið - jún. 2020

Athugasemd

Funding Information:
This research was funded by the Federal Ministry of Education and Research (BMBF) through Grant Nos. 05K16PGA and 05K16SI1, 05K19SI1 ?eMMA?. H. Masenda, D. Naidoo and K. Bharuth-Ram acknowledge the support of the DST/NRF, South Africa. B. Qi, H. P. Gislason and S. ?lafsson acknowledge the support from the Icelandic University Research Fund. I. Unzueta acknowledge the support of Ministry of Economy and Competitiveness (MINECO/FEDER) under the project RTI2018-094683-B-C55 and Basque Government Grant IT-1005-16. We also acknowledge the support of all the technical teams at ISOLDE-CERN and the European Commission through the Horizon 2020 program, grant number 654002, ENSAR2. We would like to express our special gratitude to ISOLDE-collaboration for their continued work over the years in delivering high quality 57Mn beams. We acknowledge fruitful discussions with Dr. Takashi Naka in National Institute for Materials Science, Japan.

Funding Information:
This research was funded by the Federal Ministry of Education and Research (BMBF) through Grant Nos. 05K16PGA and 05K16SI1 , 05K19SI1 “eMMA”. H. Masenda, D. Naidoo and K. Bharuth-Ram acknowledge the support of the DST / NRF , South Africa. B. Qi, H. P. Gislason and S. Ólafsson acknowledge the support from the Icelandic University Research Fund. I. Unzueta acknowledge the support of Ministry of Economy and Competitiveness (MINECO/FEDER) under the project RTI2018-094683-B-C55 and Basque Government Grant IT-1005-16 . We also acknowledge the support of all the technical teams at ISOLDE-CERN and the European Commission through the Horizon 2020 program, grant number 654002 , ENSAR2. We would like to express our special gratitude to ISOLDE-collaboration for their continued work over the years in delivering high quality 57 Mn beams. We acknowledge fruitful discussions with Dr. Takashi Naka in National Institute for Materials Science, Japan.

Publisher Copyright:
© 2020 Elsevier Ltd

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