Physical Transformation AtlasPTA
Pathway · p-f4aba51c61 · demonstrated

Magnetocaloric refrigeration

Changing magnetic fluxMagnetocaloric effectCooling

A regenerator of Gd cycled through a permanent-magnet field pumps heat.

Epistemic state of the route

known constituent relations
1 / 2 established or replicated · weakest constituent demonstrated
constituent maturity floor
K4 · experimentally observed
search for this exact route
A recorded pathway or a reviewed search records a demonstration of this composition.
recorded pathway
Magnetocaloric refrigeration · prototype
composition maturity
K7 · engineering prototype — Magnetocaloric refrigerator
recorded-pathway overlap
this route is the recorded pathway Magnetocaloric refrigeration
route-level evidence
1 source for the complete composition · 3 cited by the constituent steps
boundaries and interfaces
BOUNDARY compatible · no region transition

Explorematrix context · physics checks · performance · steps · route evidence · constituent evidence · cite

Matrix context

D = disequilibrium row · C = coupling family column. A cell reads the state of the atlas for that pair.

D.07 × C.09 · Changing magnetic flux × Caloric (magneto/electro/elasto)family: Caloric (magneto/electro/elasto)

Measured or reported performance

Summary figures only; no datum-level record yet. Each figure below is a reviewed summary, not a single measurement.

notes
COP comparable to vapour-compression in prototypes; not a power path — magnetic work in, cooling out

Steps

  1. 01
    Changing magnetic flux —drives→ Magnetocaloric effectestablishedclaim record
    magnetic → thermal
    • adiabatic magnetisation or demagnetisation of a material near its ordering temperature
    solid · ferromagnet required · magnetic field required
    refs [1] [2] [3]
  2. 02
    Magnetocaloric effect —converts into→ Coolingdemonstratedclaim record
    thermal → thermal · loss to thermal
    • a regenerative cycle rejecting heat during magnetisation and absorbing it during demagnetisation
    refs [1]

Evidence for the complete composition · 1

  1. [1]
    V. K. Pecharsky, K. A. Gschneidner Jr.. Giant magnetocaloric effect in Gd5(Si2Ge2) (1997)
    Physical Review Letters 78, 4494 · doi:10.1103/PhysRevLett.78.4494 · crossref ✓ 2026-09-19 · record

Evidence for the constituent relations · 3

  1. [1]
    V. K. Pecharsky, K. A. Gschneidner Jr.. Giant magnetocaloric effect in Gd5(Si2Ge2) (1997)
    Physical Review Letters 78, 4494 · doi:10.1103/PhysRevLett.78.4494 · crossref ✓ 2026-09-19 · record
  2. [2]
    K. A. Gschneidner Jr, V. K. Pecharsky, A. O. Tsokol. Recent developments in magnetocaloric materials (2005)
    Reports on Progress in Physics 68, 1479–1539 · doi:10.1088/0034-4885/68/6/R04 · crossref ✓ 2026-09-19 · record
  3. [3]
    X. Moya, S. Kar-Narayan, N. D. Mathur. Caloric materials near ferroic phase transitions (2014)
    Nature Materials 13, 439–450 · doi:10.1038/nmat3951 · crossref ✓ 2026-09-19 · record

Cite this route

Physical Transformation Atlas (2026). route p-f4aba51c61: Magnetocaloric refrigeration. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/path/f4aba51c61

Ids and matrix addresses are stable across revisions; the revision hash identifies the exact canonical files the record was compiled from and is meta.data_hash in every /api export. Reuse terms: see the license field in any export.