Abstract
We present neutron diffraction analysis of BaFe2(As1-xPx)2 over a wide temperature (10 to 300 K) and compositional (0.11≤x≤0.79) range, including the normal state, the magnetically ordered state, and the superconducting state. The paramagnetic to spin-density wave and orthorhombic to tetragonal transitions are first order and coincident within the sensitivity of our measurements (∼0.5 K). Extrapolation of the orthorhombic order parameter down to zero suggests that structural quantum criticality cannot exist at compositions higher than x=0.28, which is much lower than values determined using other methods, but in good agreement with our observations of the actual phase stability range. The onset of spin-density wave order shows a stronger structural anomaly than the charge-doped system in the form of an enhancement of the c/a ratio below the transition.
| Original language | English |
|---|---|
| Article number | 104513 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 90 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Sep 19 2014 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Coincident structural and magnetic order in BaFe2(As1-x Px)2 revealed by high-resolution neutron diffraction. / Allred, J. M.; Taddei, K. M.; Bugaris, D. E.; Avci, S.; Chung, D. Y.; Claus, H.; Dela Cruz, C.; Kanatzidis, Mercouri G; Rosenkranz, S.; Osborn, R.; Chmaissem, O.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 10, 104513, 19.09.2014.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Coincident structural and magnetic order in BaFe2(As1-x Px)2 revealed by high-resolution neutron diffraction
AU - Allred, J. M.
AU - Taddei, K. M.
AU - Bugaris, D. E.
AU - Avci, S.
AU - Chung, D. Y.
AU - Claus, H.
AU - Dela Cruz, C.
AU - Kanatzidis, Mercouri G
AU - Rosenkranz, S.
AU - Osborn, R.
AU - Chmaissem, O.
PY - 2014/9/19
Y1 - 2014/9/19
N2 - We present neutron diffraction analysis of BaFe2(As1-xPx)2 over a wide temperature (10 to 300 K) and compositional (0.11≤x≤0.79) range, including the normal state, the magnetically ordered state, and the superconducting state. The paramagnetic to spin-density wave and orthorhombic to tetragonal transitions are first order and coincident within the sensitivity of our measurements (∼0.5 K). Extrapolation of the orthorhombic order parameter down to zero suggests that structural quantum criticality cannot exist at compositions higher than x=0.28, which is much lower than values determined using other methods, but in good agreement with our observations of the actual phase stability range. The onset of spin-density wave order shows a stronger structural anomaly than the charge-doped system in the form of an enhancement of the c/a ratio below the transition.
AB - We present neutron diffraction analysis of BaFe2(As1-xPx)2 over a wide temperature (10 to 300 K) and compositional (0.11≤x≤0.79) range, including the normal state, the magnetically ordered state, and the superconducting state. The paramagnetic to spin-density wave and orthorhombic to tetragonal transitions are first order and coincident within the sensitivity of our measurements (∼0.5 K). Extrapolation of the orthorhombic order parameter down to zero suggests that structural quantum criticality cannot exist at compositions higher than x=0.28, which is much lower than values determined using other methods, but in good agreement with our observations of the actual phase stability range. The onset of spin-density wave order shows a stronger structural anomaly than the charge-doped system in the form of an enhancement of the c/a ratio below the transition.
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U2 - 10.1103/PhysRevB.90.104513
DO - 10.1103/PhysRevB.90.104513
M3 - Article
VL - 90
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
M1 - 104513
ER -