Exchange-spring-driven spin flop in an ErFe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>/YFe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi /><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>multilayer studied by x-ray magnetic circular dichroism

Stenning, Gavin B. G.; Buckingham, A.R.; Bowden, G. J.; Ward, R. C. C.; Laan, G. van der; Shelford, L. R.; Maccherozzi, F.; Dhesi, S. S.; Groot, P.A.J. de

doi:10.1103/physrevb.84.104428

Cited by 10 publications

(8 citation statements)

References 27 publications

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“…This finding highlights the importance of knowing the detailed magnetic interactions in the interpretation of magnetometry data. In passing, we would like to note that a similar spin-flop transition has been observed in antiferromagnetically-coupled ErFe 2 /YFe 2 superlattices by traditional magnetometry [11] and XMCD measurements [12].…”

Section: Introductionsupporting

confidence: 67%

Exchange-spring driven spin-flop transition in DyFe 2 /YFe 2 superlattices

Wang

Buckingham

Bowden

et al. 2016

Journal of Magnetism and Magnetic Materials

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Exchange-spring driven spin-flop transition is observed in hysteresis loops of an antiferromagnetic [DyFe 2 40Å/YFe 2 160Å] × 20 superlattice at temperatures higher than 100 K, with field along the in-plane easy axis [110]. OOMMF micromagnetic simulation reveals that this transition is derived from the magnetoelastic interaction in DyFe 2 . Conventional exchange spring behavior is also observable at smaller fields. Simulation shows that it is caused by the simultaneous rotation of the magnetization vectors of both the hard and soft layers towards [010]. Experiment and simulation agree qualitatively with each other.

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Section: Introductionsupporting

confidence: 67%

Exchange-spring driven spin-flop transition in DyFe 2 /YFe 2 superlattices

Wang

Buckingham

Bowden

et al. 2016

Journal of Magnetism and Magnetic Materials

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“…10, so here we present only a brief outline. The REFe 2 compounds are characterized by a strong ferromagnetic (FM) Fe-Fe exchange B EX (Fe-Fe) $600 K, which determines their high Curie temperatures.…”

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confidence: 99%

“…7 Most of this work has been carried out using conventional characterization methods such as bulk-magnetization, transport measurements, supplemented by micro-magnetic simulations. [8][9][10] More recently however, erbium-specific x-ray magnetic circular dichroism (XMCD) has been performed on a double-switching transition in an ErFe 2 /YFe 2 sample. Here, bulk magnetic measurements reveal only a weak signature of the double-switching at $200 K. 7 In contrast, Er-XMCD proved instrumental in unraveling the nature of the double-switch.…”

mentioning

confidence: 99%

“…Here, bulk magnetic measurements reveal only a weak signature of the double-switching at $200 K. 7 In contrast, Er-XMCD proved instrumental in unraveling the nature of the double-switch. 10 The origin of the latter was traced to the magnetic anisotropy of the Er 3þ ion, which is characterized by low energy saddle points between two near-cubic h111i easy axes. As the magnetic field is increased, the balance of the magnetic exchange, Zeeman and anisotropy energies slips to and fro between in-plane and out-of-plane h111i axes.…”

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confidence: 99%

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Magnetic reversal in a YFe2 dominated DyFe2/YFe2 multilayer film

et al. 2012

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“…For example, DyFe 2 /YFe 2 multilayer films have been used to demonstrate exchange-springdriven giant magnetoresistance [12] and negative coercivity [13]. In addition, Er-selective x-ray magnetic circular dichroism (Er-XMCD) experiments proved decisive in unraveling a double magnetic switching mechanism in an ErFe 2 /YFe 2 multilayer at 200 K [14]. In this system bulk magnetic measurements reveal only a weak signature of a magneticdouble switch at ∼200 K [15].…”

Section: Introductionmentioning

confidence: 97%

Magnetic reversal in Dy-dopedDyFe2/YFe2superlattice films

et al. 2015

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Reversible magnetic exchange springs can be formed in the magnetically soft YFe 2 layers of epitaxial DyFe 2 /YFe 2 multilayer films. Here we show that the insertion of just two monolayers of DyFe 2 , placed directly in the middle of the YFe 2 layers, brings about substantial changes. Results are presented for a Dy-doped (110)-oriented [DyFe 2 (60Å)/YFe 2 (120Å)/DyFe 2 (8Å)/YFe 2 (120Å)] 15 multilayer film, measured at 100 K in fields of up to ±10 T. Using bulk magnetometry, micromagnetic modeling, and Dy-specific x-ray magnetic circular dichroism, it is shown that Dy doping substantially increases the number of spin states available to the system. Altogether 12 distinct spring states are identified which bring additional complexity to the magnetic reversal process. In particular, the exchange springs are no longer reversible, exhibiting magnetic exchange-spring collapse. Full and partial magnetic loops are presented for fields applied along the in-plane easy [001] axis and the in-plane hard [110] axis. In particular, it is demonstrated that exchange-spring collapse is sharpest when the field is applied along a hard in-plane [110] axis.

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Exchange-spring-driven spin flop in an ErFe2/YFe2multilayer studied by x-ray magnetic circular dichroism

Cited by 10 publications

References 27 publications

Exchange-spring driven spin-flop transition in DyFe 2 /YFe 2 superlattices

Exchange-spring driven spin-flop transition in DyFe 2 /YFe 2 superlattices

Magnetic reversal in a YFe2 dominated DyFe2/YFe2 multilayer film

Magnetic reversal in Dy-dopedDyFe2/YFe2superlattice films

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