Pressure-dependent spin fluctuations and magnetic structure in the topologically frustrated spin glass alloy Y(Mn0.95Al0.05)(2)
(2012) In Physical Review B (Condensed Matter and Materials Physics) 85(18).- Abstract
- Longitudinal field (LF = 110 G) muon spin relaxation (mu SR) has been used to investigate the pressure dependence (P < 4.5 kbar) of paramagnetic spin fluctuations in the spin glass alloy Y(Mn0.95Al0.05)(2) via observation of the mu(+) spin depolarization. External mechanical force is seen to counteract the Al-induced chemical pressure, fully delocalizing the Mn moment and altering the nature of the spin fluctuation spectrum sensed by the muon. A qualitative change in the functional form of the mu(+) spin depolarization is observed. Complementary ambient and high-pressure neutron diffraction measurements suggest not only pressure-dependent structural transitions but also the instability of the localized manganese moment. The ambient and... (More)
- Longitudinal field (LF = 110 G) muon spin relaxation (mu SR) has been used to investigate the pressure dependence (P < 4.5 kbar) of paramagnetic spin fluctuations in the spin glass alloy Y(Mn0.95Al0.05)(2) via observation of the mu(+) spin depolarization. External mechanical force is seen to counteract the Al-induced chemical pressure, fully delocalizing the Mn moment and altering the nature of the spin fluctuation spectrum sensed by the muon. A qualitative change in the functional form of the mu(+) spin depolarization is observed. Complementary ambient and high-pressure neutron diffraction measurements suggest not only pressure-dependent structural transitions but also the instability of the localized manganese moment. The ambient and high-pressure mu(+) spin depolarization results from Y(Mn0.95Al0.05)(2) are likened to P = 0 results reported for other Y(Mn1-xAlx)(2) alloys. Finally, the possibility of using mu(+) spin depolarization rates to predict experimental inelastic neutron scattering (INS) line widths is considered; the muon having the potential to provide information equivalent to that obtained via INS but with greatly reduced data collection times. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2805966
- author
- Telling, M. T. F. ; Knight, K. S. ; Pratt, F. L. ; Church, A. J. ; Deen, Pascale LU ; Ellis, K. J. ; Watanabe, I. and Cywinski, R.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 85
- issue
- 18
- publisher
- American Physical Society
- external identifiers
-
- wos:000304173000003
- scopus:84861658308
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.85.184416
- language
- English
- LU publication?
- yes
- id
- 39bec4cb-bdc7-4e6a-9a52-e55d7b69e392 (old id 2805966)
- date added to LUP
- 2016-04-01 13:00:35
- date last changed
- 2022-01-27 08:51:30
@article{39bec4cb-bdc7-4e6a-9a52-e55d7b69e392, abstract = {{Longitudinal field (LF = 110 G) muon spin relaxation (mu SR) has been used to investigate the pressure dependence (P < 4.5 kbar) of paramagnetic spin fluctuations in the spin glass alloy Y(Mn0.95Al0.05)(2) via observation of the mu(+) spin depolarization. External mechanical force is seen to counteract the Al-induced chemical pressure, fully delocalizing the Mn moment and altering the nature of the spin fluctuation spectrum sensed by the muon. A qualitative change in the functional form of the mu(+) spin depolarization is observed. Complementary ambient and high-pressure neutron diffraction measurements suggest not only pressure-dependent structural transitions but also the instability of the localized manganese moment. The ambient and high-pressure mu(+) spin depolarization results from Y(Mn0.95Al0.05)(2) are likened to P = 0 results reported for other Y(Mn1-xAlx)(2) alloys. Finally, the possibility of using mu(+) spin depolarization rates to predict experimental inelastic neutron scattering (INS) line widths is considered; the muon having the potential to provide information equivalent to that obtained via INS but with greatly reduced data collection times.}}, author = {{Telling, M. T. F. and Knight, K. S. and Pratt, F. L. and Church, A. J. and Deen, Pascale and Ellis, K. J. and Watanabe, I. and Cywinski, R.}}, issn = {{1098-0121}}, language = {{eng}}, number = {{18}}, publisher = {{American Physical Society}}, series = {{Physical Review B (Condensed Matter and Materials Physics)}}, title = {{Pressure-dependent spin fluctuations and magnetic structure in the topologically frustrated spin glass alloy Y(Mn0.95Al0.05)(2)}}, url = {{http://dx.doi.org/10.1103/PhysRevB.85.184416}}, doi = {{10.1103/PhysRevB.85.184416}}, volume = {{85}}, year = {{2012}}, }