Abstract
The magnetic and electrical transport properties of metallic spiral antiferromagnet SrFeO{sub 2.95} have been examined in the temperature range from 4.5-300 K. A large negative magnetoresistance below 50 K is observed. We find hysteresis in resistivity in 0 and 9 T due to the coexistence of antiferromagnetic and paramagnetic domains in the temperature region 50-80 K. The metal-insulator transition temperatures can be tuned by applying magnetic fields. The low-temperature conductivity, {sigma}(T{yields}0) obeys a critical law of the form {sigma}(T{yields}0){proportional_to}[E{sub F}(0)-E{sub C}]{sup {nu}}{identical_to}(H-H{sub C}){sup {nu}} with {nu}=1, where H{sub C} is a critical field and E{sub C} the mobility edge. Such behavior is consistent with scaling theories of both localization and interaction effects. The observation of the present study indicates that the electronic states become more extended with increasing field.
Citation Formats
Zhao, Y M, and Zhou, P F.
Metal-insulator transition in helical SrFeO{sub 3-{delta}} antiferromagnet.
Netherlands: N. p.,
2004.
Web.
doi:10.1016/j.jmmm.2004.04.107.
Zhao, Y M, & Zhou, P F.
Metal-insulator transition in helical SrFeO{sub 3-{delta}} antiferromagnet.
Netherlands.
https://doi.org/10.1016/j.jmmm.2004.04.107
Zhao, Y M, and Zhou, P F.
2004.
"Metal-insulator transition in helical SrFeO{sub 3-{delta}} antiferromagnet."
Netherlands.
https://doi.org/10.1016/j.jmmm.2004.04.107.
@misc{etde_20618172,
title = {Metal-insulator transition in helical SrFeO{sub 3-{delta}} antiferromagnet}
author = {Zhao, Y M, and Zhou, P F}
abstractNote = {The magnetic and electrical transport properties of metallic spiral antiferromagnet SrFeO{sub 2.95} have been examined in the temperature range from 4.5-300 K. A large negative magnetoresistance below 50 K is observed. We find hysteresis in resistivity in 0 and 9 T due to the coexistence of antiferromagnetic and paramagnetic domains in the temperature region 50-80 K. The metal-insulator transition temperatures can be tuned by applying magnetic fields. The low-temperature conductivity, {sigma}(T{yields}0) obeys a critical law of the form {sigma}(T{yields}0){proportional_to}[E{sub F}(0)-E{sub C}]{sup {nu}}{identical_to}(H-H{sub C}){sup {nu}} with {nu}=1, where H{sub C} is a critical field and E{sub C} the mobility edge. Such behavior is consistent with scaling theories of both localization and interaction effects. The observation of the present study indicates that the electronic states become more extended with increasing field.}
doi = {10.1016/j.jmmm.2004.04.107}
journal = []
issue = {2-3}
volume = {281}
journal type = {AC}
place = {Netherlands}
year = {2004}
month = {Oct}
}
title = {Metal-insulator transition in helical SrFeO{sub 3-{delta}} antiferromagnet}
author = {Zhao, Y M, and Zhou, P F}
abstractNote = {The magnetic and electrical transport properties of metallic spiral antiferromagnet SrFeO{sub 2.95} have been examined in the temperature range from 4.5-300 K. A large negative magnetoresistance below 50 K is observed. We find hysteresis in resistivity in 0 and 9 T due to the coexistence of antiferromagnetic and paramagnetic domains in the temperature region 50-80 K. The metal-insulator transition temperatures can be tuned by applying magnetic fields. The low-temperature conductivity, {sigma}(T{yields}0) obeys a critical law of the form {sigma}(T{yields}0){proportional_to}[E{sub F}(0)-E{sub C}]{sup {nu}}{identical_to}(H-H{sub C}){sup {nu}} with {nu}=1, where H{sub C} is a critical field and E{sub C} the mobility edge. Such behavior is consistent with scaling theories of both localization and interaction effects. The observation of the present study indicates that the electronic states become more extended with increasing field.}
doi = {10.1016/j.jmmm.2004.04.107}
journal = []
issue = {2-3}
volume = {281}
journal type = {AC}
place = {Netherlands}
year = {2004}
month = {Oct}
}