2017
DOI: 10.1103/physrevb.96.184427
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Criteria for accurate determination of the magnon relaxation length from the nonlocal spin Seebeck effect

Abstract: The nonlocal transport of thermally generated magnons not only unveils the underlying mechanism of the spin Seebeck effect, but also allows for the extraction of the magnon relaxation length (λm) in a magnetic material, the average distance over which thermal magnons can propagate. In this study, we experimentally explore in yttrium iron garnet (YIG)/platinum systems much further ranges compared with previous investigations. We observe that the nonlocal SSE signals at long distances (d) clearly deviate from a … Show more

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Cited by 32 publications
(50 citation statements)
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“…respectively. Both means could be used to investigate the magnon transport properties in magnetic insulators, as demonstrated in previous reports [40][41][42][43]. In our experiment with the AC injection curent (Iin in Fig.…”
Section: Figure 1(a) Illustrates the Magnon Transport In The Quasi-2dmentioning
confidence: 54%
See 1 more Smart Citation
“…respectively. Both means could be used to investigate the magnon transport properties in magnetic insulators, as demonstrated in previous reports [40][41][42][43]. In our experiment with the AC injection curent (Iin in Fig.…”
Section: Figure 1(a) Illustrates the Magnon Transport In The Quasi-2dmentioning
confidence: 54%
“…(Fig. S9) [42]. The spin signal probed from the local Pt injector is of opposite sign compared to the nonlocal Pt detector which probes the magnon transport across a spacing that is much bigger than the thickness of MnPS3 (Fig.…”
Section: Since the 2d Mnps3 Is Insulating (Figs S6 And S7) The Flowmentioning
confidence: 96%
“…Note that only the datapoints in the exponential regime can be used to extract λ m , which typical starts at d = λ m and extends to a few λ m . 38 Further than the exponential regime, V TG starts to decay geometrically as 1/d 2 , dominated by the temperature gradient present near the detector. Based on the λ m that we extracted from the decay of the electrically injected magnon signals, we identify 2 ≤ d ≤ 8 µm as the exponential regime and obtained λ m to be around 2.2 or 2.3 µm from the decay of V TG .…”
Section: Figures 1(e) and 1(f) Plot Typical Results From The Nonlocalmentioning
confidence: 96%
“…NL stands for the nonlocal SSE. 3,15,[36][37][38][39][40] The conductance of the NFO thin films was checked by measuring resistances between random pairs of electrically detached contacts, which yielded values over GΩ, confirming the insulating nature of the NFO films.…”
Section: And V 2fmentioning
confidence: 92%
“…The temperature gradient extends through the YIG sample and therefore, thermally-generated magnons are not only generated close to the injector, but also in the region between the injector and detector. Magnons accumulate at the bottom of the YIG film and then diffuse towards the detector [18]. Therefore, less thermally-generated magnons cross the modulator at the interface while diffusing towards the detector, which results in a relatively smaller modulation of the second harmonic signal in comparison to the first harmonic signal.…”
mentioning
confidence: 99%