The individual domains grow to coalesce into a large single domain, where it can be said that the material has undergone a transition into its ferromagnetic phase.<\/li>\n<\/ul>\nScientists have noted that the knowledge gathered in this study has prospective applications for utilising FeRh in future data-storage technology. This is due to the observations made during the ferromagnetic phase, such as the various stages involved and the corresponding time scales in inducing a well-defined magnetisation with a light pulse.<\/p>\n
Utilising FeRh in data-storage technology<\/h3>\n FeRh can potentially be utilised as the storage medium in heat-assisted magnetic recording (HAMR), which is a technology that employs both external heat and local magnetic fields to store information with a much higher density of tiny magnetic regions (or bits) where information is accumulated.<\/p>\n
\u201cUnderstanding the details of various stages involved in the fast emergence of magnetisation in a material helps scientists in developing ultrafast and energy-efficient magnetic data storage technologies,\u201d explained Dr Rajasekhar Medapalli, Physicist at Lancaster University.<\/p>\n
The speed of magnetising a material<\/h3>\n The research team utilised intense ultrashort laser pulses to rapidly heat FeRh in a brief artificial stimulus, each pulse lasting only a quadrillionth of a second. Upon the interaction with the material, the laser pulse raised the temperature by a few hundred degrees Celsius at timescales shorter than a billionth of a second.<\/p>\n
For decades researchers in the scientific community have condensed matter physics to utilise this ultrafast heat <\/span>to<\/span> control the magnetic phase transition in <\/span>FeRh<\/span>.<\/span> H<\/span>owever, it has been a challenge to experimentally detect this transition.<\/span><\/span>\u00a0<\/span><\/p>\nTo overcome this issue, the team considered how time-varying magnetisation produces a time-varying electric field in a medium that should act as an emitter of radiation. The emitted radiation carries sensitive information about its origin, i.e., time-varying magnetisation in the sample.<\/p>\n
Scientists employed the novel double pump time-resolved spectroscopy technique that was developed at Radboud University. They utilised two laser pulses for double pumping: while the first laser pulse serves as an ultrafast heater, the second one helps in generating an electric field. By detecting this field at multiple time-lapses between the two laser pulses, researchers were able to consider the speed of magnetising a material.<\/p>\n","protected":false},"excerpt":{"rendered":"
An international team of scientists, including researchers from Lancaster University, have discovered the speed of magnetising a material.\u00a0 The research team consisted of scientists from Lancaster University, the University of California San Diego, the Moscow Institute of Physics and Technology, and Radboud University. Together they have addressed one of the most intriguing questions of magnetism: […]<\/p>\n","protected":false},"author":21,"featured_media":22294,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[24429],"tags":[833,821],"acf":[],"yoast_head":"\n
Groundbreaking research reveals the speed of magnetising a material<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n \n \n \n \n \n\t \n\t \n\t \n