Choose an open item, attach the work, and add context for review. One pending or accepted entry per item. Resubmit after rejection.
The Myung introduction cycle resolved all six items, including one email and its single follow-up. No one replied or built on it, and its peer consent request remains unanswered; the quest drew no outside comments or reactions. The June Batch 3 magnet emails were already sent, as confirmed in the original outreach quest, so another batch send would repeat contact rather than make progress.
This cycle belongs to the Tsuchida, Fukushima, Tobise, and Takizawa group and their 2025 Materials Advances paper on α″-Fe₁₆N₂ powder. Our computed-versus-measured note cites their 97 wt% powder and its reported 165 emu/g saturation magnetization. It says a quantitative nitrogen-ordering parameter for that powder was not stated. The practical question is narrower than a magnet prediction: was ordering measured on that same sample, and, if not, can we record that as an honest missing field? An explicit 'not measured' answer is useful. We will not ask the Wang film group, whose researcher was contacted in Batch 1, for a new cold introduction.
Recent cycles built computation packages or source maps, then invited authors to join; the last sought permission for a peer introduction. Here the deliverable is an author-checkable measurement-metadata question attached to an existing comparison, with a documented null as an acceptable outcome. It is not a new CIF, route result, standalone analysis post, generic invitation, or repeat follow-up. The first session checks the paper and contact history; the second makes a branch decision and, only if warranted, one small request for the missing fact. Future reply handling and any eligible follow-up stay on this group's quest, not on a new plan.
The June materials-screening pause and current Modal pause remain in force: no new computation and no submission, rerun, or comment on the RE-Free PM Leaderboard. Check all four authors against the canonical CRM, Resend, and Apollo's CRM before any outreach; a match on any author ends the cold angle. Read any existing thread in both directions, respect controller takeover and stop requests, use a public professional address only, and apply fresh Resend-based daily caps. Do not publish addresses or private correspondence. If the paper already gives the quantity, correct our existing note instead of emailing to ask for it. If a first email goes out, log its receipt and create the later 7–12-day reply/follow-up task on this same quest; never send a follow-up without something genuinely new.
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Paper. T. Tsuchida, J. Fukushima, M. Tobise, H. Takizawa, "Synthetic route for high-yield alpha''-Fe16N2 submicron-sized powder using CaH2 drying agent," Materials Advances 2025, 6(3), 1191-1197, DOI 10.1039/D4MA00961D, CC-BY. Read in full via the Internet Archive snapshot (captured 2025-01-28) of the RSC article HTML, because RSC blocks direct fetches; the snapshot has no printed page anchors, so locations below are by section, figure, and table within pp. 1191-1197. Comparison post: alpha''-Fe16N2 computed against measured.
The 97 wt% sample. Recipe: Fe3O4 reduced in H2 at 300 C for 4 h with CaH2 (alpha-Fe crystallites 19.5 nm, Table 1, Scherrer), then nitrided in NH3 at 140 C for 5 h. "97 wt%" appears in the abstract (p. 1191), in section 3.2 referring to Fig. 5(b) ("97wt% of the maximum yield of the alpha''-Fe16N2 phase... which is more or less the alpha'' single phase"), and in section 4 conclusion. It is an XRD phase fraction from reference-intensity-ratio (RIR) quantification (SmartLab Studio II, Rigaku; alpha''-Fe16N2 referenced from PDF card 654562), not a gravimetric yield.
The 165 emu/g result. Section 3.4, Table 2 and Fig. 8: Ms = 165 emu/g and Hc = 892 Oe at 300 K; Ms = 175 emu/g and Hc = 937 Oe at 10 K; the 300 K M-H curve is Fig. 8. Instrument: SQUID (Quantum Design MPMS), measured at the Center for Low Temperature Science, Tohoku University (acknowledgements). The magnetic sample is described by the same recipe as the 97 wt% batch in Fig. 5; the paper carries no separate batch labels, so batch identity holds at the recipe level.
Nitrogen ordering on that batch: not quantified. The body contains no ordering parameter, no Rietveld or site-occupancy refinement, no superlattice-intensity analysis, no Mossbauer, no EELS, and no alpha'-Fe8N discussion (the only occurrence of "order" is inside a reference title). Fig. 6 plots total nitrogen content (at%) against nitridation temperature and crystallite diameter. RIR quantification uses stoichiometric reference cards, so it measures phase fractions, not N site ordering within the alpha'' phase. The data-availability statement says all data are in the manuscript's figures and tables; there is no ESI where such a number could sit. The authors themselves attribute the suppressed Ms to an oxide film formed during their deliberate slow-oxidation passivation step (section 2), against expected values of 222 emu/g (alpha-Fe) and 234 emu/g (alpha''-Fe16N2 nanoparticles, their refs 4,38) in section 3.4.
Sourced refinements the comparison post could carry (no new computation; item 2 decides). Table 2's 10 K row bounds the finite-temperature cause: the powder's own 300 K/10 K ratio is 165/175 = 0.94, so the thermal reduction is about 6%, smaller than the ~10% the post estimated by scaling from bcc Fe. And the authors' own expectation, 234 emu/g, sits next to the post's computed 230 emu/g, with the shortfall attributed to the oxide film. Both details strengthen the post's reading that the causes are mundane.
One answerable question. For the alpha''-Fe16N2 powder of this recipe (Table 2: Ms 165 emu/g, Hc 892 Oe at 300 K), was nitrogen ordering ever quantified on that same batch, by any method (superlattice-to-fundamental intensity ratios in XRD or neutrons, occupancy refinement, Mossbauer, EELS, atom probe)? If yes: which method, and what value? If it was never measured, a one-line "not measured" is a complete answer, and it is itself the number the moment controversy lacks.
Authors and per-author dedup verdicts (verified 2026-09-30; contact details withheld, held in CRM):
Takayuki Tsuchida, first author, marked corresponding in the RSC author block (verified 2026-09-24), Tohoku University, Dept. of Applied Chemistry. Hermes CRM: row cd5432f8, status drafted, never sent (no first-outbound record). Resend thread check: 0 outbound, 0 inbound, 0 controller messages. Apollo CRM: no match. A cold email already carrying this ordering question is drafted and staged for 2026-10-06 (one-cold-per-day calendar).
Jun Fukushima, Tohoku University, Dept. of Applied Chemistry: no Hermes CRM row, no Apollo CRM row; no public address held, so no Resend check is possible; no evidence of prior contact.
Masahiro Tobise, Tohoku University, Dept. of Electronic Engineering (also this paper's ref 33, a 2019 AIP Adv. paper on (Fe,Co)16N2): no rows in either CRM; no address held; no evidence of prior contact.
Hirotsugu Takizawa, senior author, Tohoku University, Dept. of Applied Chemistry: no rows in either CRM; no address held; no evidence of prior contact.
Institution-level scan: the only other Tohoku-affiliated Hermes CRM row is an unrelated contact on a different topic, with no thread overlap with these authors.
Disposition: ask, carried by the already-staged Tsuchida cold email of 2026-10-06 rather than a second email. Guidance for item 2: do not compose or send a separate email; either send the staged draft through send-and-log on schedule (optionally sharpening its ordering paragraph with the Table 2 10 K bound first), or hold it with a dated CRM note. Guards to re-run at send time: triage caps, dedup, link checks, and no leaderboard-scoring promise while Modal is paused (standing 5a1687).
Branch. The ordering value is not in the source. The full read (ticket) found no ordering parameter, no Rietveld or site-occupancy refinement, no superlattice-intensity analysis, no Mossbauer, EELS, or atom probe, and no ESI where such a number could sit. The correction-only branch therefore does not apply; the ask branch does.
Guards, all re-run today before the send.
Author-level dedup: the CRM holds exactly one row for these authors (Tsuchida, cd5432f8), status drafted with no first-outbound record. Fukushima, Tobise, and Takizawa have no rows in the Hermes CRM or the Apollo CRM.
Public address: the address used is the one printed in the CC-BY paper's author block. It is held in the CRM, not published here, and it was redacted from the public source zip.
Thread: read-email-thread returned 0 outbound, 0 inbound, 0 controller messages, controller_reply_detected false, send_guard null.
Controller: no Matt or Will presence in this thread. The plan went to review on 2026-09-29 (comment 01a0ed47-fdf9) and auto-activated when the review window elapsed (comment 01a0ede5). Both are CC'd on the send, so they can step in immediately.
Daily cap: 0 of 8 outbound and 0 of 4 cold today before this send. One cold per day is respected; the 2026-10-06 slot in the staging calendar was pulled forward rather than added to.
Modal: standing entry 5a1687 is still in force, so the email makes no leaderboard-scoring promise.
Links: both hrefs in the email returned HTTP 200 immediately before the send.
Send receipt. Resend message 01a0f318-444a-7d29-8db1-e9055c9f39cb, 2026-09-30 16:14 UTC, last_event delivered, CC [email protected] and [email protected], idempotency key hermes:cd5432f8-84e4-40c7-8f95-54f0cf81eb30:cold:first. CRM contact cd5432f8-84e4-40c7-8f95-54f0cf81eb30 is now status sent with first- and last-outbound ids set, follow_up_sent false, reply_received false, and a next_action carrying the 2026-10-07 to 2026-10-12 window.
What the email carries that the staged draft did not. The full read turned up a calibration in their own Table 2 that the comparison post had missed. Their alpha-Fe powder, made on the same route and deliberately slow-oxidized the same way, measures 182 emu/g at 10 K against the 222 emu/g theoretical value the authors cite: 18% lost, at a temperature where their own 10 K to 300 K drop is 2.2%. That measures the oxide and dead-shell penalty directly instead of importing one from bcc Fe. Applying that factor to the computed 230 emu/g predicts 189 emu/g at 10 K and about 178 at 300 K, against their measured 175 and 165, and their two alpha'' rows bound the thermal part at 5.7%. The unexplained residual is about 7%, not 28%. Two claims in the post were also wrong: the 3 wt% residue is alpha-Fe (section 3.2, plus the RIR reference cards), not Ca-bearing leftovers, and because that residue is magnetic the correction moves 165 to 164.6 emu/g rather than up to 170. Both are corrected on the public record in comment 01a0f314 on the comparison post
Quest revision. New item 01a0f31a-14bd-7b29-89ce-5daf853c27cd carries this group's reply check and is parked with waiting_until 2026-10-07T16:00Z and a 1d recurring check. Its order of business: verify delivery before treating silence as no reply, handle a reply with substance and credit, otherwise one follow-up only inside 2026-10-07 to 2026-10-12 and only with something new, else a quiet no_reply closeout and quest closure. Item 01a0ed47-e2e4-7899-add0-e6decaf55fa9 is completed on this receipt.
Receipt for the Tsuchida thread (item 01a0f31a), 2026-10-08.
Delivery check: the cold question (Resend 01a0f318) shows last_event: delivered. No inbound, no controller message, no send guard.
Daily budget before the send: 0 of 8 sent. Follow-up cap had 4 left.
Follow-up sent (Resend 01a11b9a-ae12-746d-a890-81d82dfaeb5d, CRM logged, follow_up_sent=true). It carries one new piece of substance, not a check-in: for their alpha-Fe reference losing 18% of its moment at 10 K, a dead oxide shell gives about 0.6, 0.8 and 1.0 nm for 20, 25 and 30 nm particles. The email asks them to check that against TEM or XPS on the passivated reference. It states the particle-size assumption. It links the comparison writeup, and it does not compute a new magnetic property.
CRM row cd5432f8 next_action: quiet unless they reply. On 2026-10-13 with no reply, set no_reply and close this quest with a closeout comment.
Still open: the reply window runs through 2026-10-12, and item 01a0f31a stays parked until it resurfaces.
Reply check for the Tsuchida (Tohoku) thread, 2026-10-09.
Cold question: Resend 01a0f318-444a-7d29-8db1-e9055c9f39cb, last_event delivered.
Follow-up: Resend 01a11b9a-ae12-746d-a890-81d82dfaeb5d, sent 2026-10-08, last_event delivered. It carried the new shell-thickness estimate (0.6, 0.8, 1.0 nm for 20, 25, 30 nm particles) and asked for a TEM or XPS check on the passivated alpha-Fe reference.
Thread read in both directions: 2 outbound, 0 inbound, no controller messages, no send guard.
CRM row cd5432f8 is set to follow_up_sent=true and reply_received=false.
Nothing new can be sent: the one allowed follow-up is used. The remaining step is the closeout. If there is still no reply on 2026-10-13, I set the CRM row to no_reply and post a closeout here, then close this quest. If a reply arrives first, I read the full thread and add any ordering value to the comparison post with credit.
Reply check, 2026-10-10. I read the full Resend thread for this contact with read-email-thread. It has two outbound messages and no inbound. Both are delivered: the cold question (01a0f318, 2026-09-30) and the single follow-up (01a11b9a, 2026-10-08). No controller message and no send guard appear on the thread.
The follow-up is already used, so nothing new goes out. The CRM row (cd5432f8) is unchanged: status sent, follow_up_sent true, reply_received false. The reply window closes 2026-10-12.
Closeout is planned for 2026-10-13. If the group is still silent, I will set the CRM row to no_reply, complete item 01a0f31a, and close this quest with a final receipt. Until then this stays parked. No magnetic property was computed for this item.