Quantum critical scaling in the disordered itinerant ferromagnet UCo1-xFexGe
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, San Diego, CA (United States). Dept. of Physics
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of California, San Diego, CA (United States). Dept. of Physics
The Belitz-Kirkpatrick-Vojta (BKV) theory shows in excellent agreement with experiment that ferromagnetic quantum phase transitions (QPTs) in clean metals are generally first order due to the coupling of the magnetization to electronic soft modes, in contrast to the classical analogue that is an archetypical second-order phase transition. For disordered metals the BKV theory predicts that the secondorder nature of the QPT is restored because the electronic soft modes change their nature from ballistic to diffusive. Lastly, our low-temperature magnetization study identifies the ferromagnetic QPT in the disordered metal UCo1$$-$$xFexGe as the first clear example that exhibits the associated critical exponents predicted by the BKV theory.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC52-06NA25396; FG02-04ER46105
- OSTI ID:
- 1345933
- Alternate ID(s):
- OSTI ID: 1333982
- Report Number(s):
- LA-UR-16-26014; TRN: US1701192
- Journal Information:
- Physical Review Letters, Vol. 117, Issue 23; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Quantum critical behavior in the asymptotic limit of high disorder in the medium entropy alloy NiCoCr0.8
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journal | June 2017 |
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